ASTRON VO TAPivo://astron.nl/tapASTRONASTRONhttps://www.astron.nl/sites/default/files/styles/Logo-footer.png2021-02-22T22:05:19Michael Sipior

Oude Hoogeveensedijk 4, 7991PD Dwingeloo, the Netherlands

vo@astron.nlVirtual observatoryCatalogsADQLThe The VO @ ASTRON's TAP end point. The Table Access Protocol (TAP) lets you execute queries against our database tables, inspect various metadata, and upload your own data. It is thus the VO's premier way to access public data holdings. Tables exposed through this endpoint include: obscore from the ivoa schema, main from the lbcs schema, main, msssvf_img_main from the mvf schema, images, source_catalog from the apertif_lockman schema, frb_det, frb_obs from the arts_dr1 schema, img_main, main from the lofartier1 schema, mosaic, source_catalog from the lolss schema, frb_det, frb_obs from the arts_dr2 schema, main from the svc schema, images, source_catalog from the apertif_elais schema, main, mom0 from the sauron schema, main_gausses, main_sources, mosaics, pointings from the lotss_dr3 schema, images, source_catalog from the apertif_dr_bootes schema, columns, groups, key_columns, keys, schemas, tables from the tap_schema schema, hetdex_images, main, main_merged from the hetdex schema, img_main from the msss schema, img_main, main from the tgssadr schema, beam_cubes, calibrated_visibilities, continuum_images, flux_cal_visibilities, pol_cal_visibilities, pol_cubes, raw_visibilities, spectral_cubes from the apertif_dr2 schema, beam_cubes, calibrated_visibilities, continuum_images, flux_cal_visibilities, pol_cal_visibilities, pol_cubes, raw_visibilities, source_catalog, spectral_cubes from the apertif_dr1 schema, main_gausses, main_sources, mosaics from the lotss_dr2 schema.https://vo.astron.nl/__system__/tap/run/infohttps://vo.astron.nl/tapObscore-1.1ADQL2.12.0The Astronomical Data Query Language is the standard IVOA dialect of SQL; it contains a very general SELECT statement as well as some extensions for spherical geometry and higher mathematics.

gavo_simbadpoint(identifier TEXT) -> POINT

gavo_simbadpoint queries simbad for an identifier and returns the corresponding point. Note that identifier can only be a literal, i.e., as simple string rather than a column name. This is because our database cannot query simbad, and we probably wouldn't want to fire off millions of simbad queries anyway; use simbad's own TAP service for this kind of applications.

ivo_interval_has(val NUMERIC, iv INTERVAL) -> INTEGER

The function returns 1 if the interval iv contains val, 0 otherwise. The lower limit is always included in iv, behaviour on the upper limit is column-specific.

gavo_getauthority(ivoid TEXT) -> TEXT

returns the authority part of an ivoid (or, more generally a URI). So, ivo://org.gavo.dc/foo/bar#baz becomes org.gavo.dc. The behaviour for anything that's not a full URI is undefined.

gavo_match(pattern TEXT, string TEXT) -> INTEGER

gavo_match returns 1 if the POSIX regular expression pattern matches anything in string, 0 otherwise.

ivo_healpix_center(hpxOrder INTEGER, hpxIndex BIGINT) -> POINT

returns a POINT corresponding to the center of the healpix with the given index at the given order.

ivo_string_agg(expression TEXT, delimiter TEXT) -> TEXT

An aggregate function returning all values of expression within a GROUP contcatenated with delimiter

ivo_apply_pm(ra DOUBLE PRECISION, dec DOUBLE PRECISION, pmra DOUBLE PRECISION, pmde DOUBLE PRECISON, epdist DOUBLE PRECISION) -> POINT

Returns a POINT (in the UNDEFINED reference frame) for the position an object at ra/dec with proper motion pmra/pmde has after epdist years. positions must be in degrees, PMs in should be in julian years (i.e., proper motions are expected in degrees/year). pmra is assumed to contain cos(delta). NOTE: This currently is a crappy approximation that does *not* go through the tangential plane. If you use it, let the operators know so we replace it with something real.

gavo_to_jd(d TIMESTAMP) -> DOUBLE PRECISION

The function converts a postgres timestamp to julian date. This is naive; no corrections for timezones, let alone time scales or the like are done; you can thus not expect this to be good to second-precision unless you are careful in the construction of the timestamp.

ivo_interval_overlaps(l1 NUMERIC, h1 NUMERIC, l2 NUMERIC, h2 NUMERIC) -> INTEGER

The function returns 1 if the interval [l1...h1] overlaps with the interval [l2...h2]. For the purposes of this function, the case l1=h2 or l2=h1 is treated as overlap. The function returns 0 for non-overlapping intervals.

gavo_transform(from_sys TEXT, to_sys TEXT, geo GEOMETRY) -> GEOMETRY

The function transforms ADQL geometries between various reference systems. geo can be a POINT, a CIRCLE, or a POLYGON, and the function will return a geometry of the same type. In the current implementation, from_sys and to_sys must be literal strings (i.e., they cannot be computed through expressions or be taken from database columns). All transforms are just simple rotations, which is only a rough approximation to the actual relationships between reference systems (in particular between FK4 and ICRS-based ones). Not that, in particular, the epoch is not changed (i.e., no proper motions are applied). We currently support the following reference frames: ICRS, FK5 (which is trested as ICRS), FK4 (for B1950. without epoch-dependent corrections), GALACTIC. Reference frame names are case-sensitive.

ivo_healpix_index(order INTEGER, ra DOUBLE PRECISION, dec DOUBLE PRECISION) -> BIGINT

Returns the index of the (nest) healpix with order containing the spherical point (ra, dec). An alternative, 2-argument form ivo_healpix_index(order INTEGER, p POINT) -> BIGINT is also available.

ivo_hashlist_has(hashlist TEXT, item TEXT) -> INTEGER

The function takes two strings; the first is a list of words not containing the hash sign (#), concatenated by hash signs, the second is a word not containing the hash sign. It returns 1 if, compared case-insensitively, the second argument is in the list of words coded in the first argument. The behaviour in case the the second argument contains a hash sign is unspecified.

gavo_histogram(val REAL, lower REAL, upper REAL, nbins INTEGER) -> INTEGER[]

The aggregate function returns a histogram of val with nbins+2 elements. Assuming 0-based arrays, result[0] contains the number of underflows (i.e., val<lower), result[nbins+1] the number of overflows. Elements 1..nbins are the counts in nbins bins of width (upper-lower)/nbins. Clients will have to convert back to physical units using some external communication, there currently is no (meta-) data as lower and upper in the TAP response.

gavo_to_mjd(d TIMESTAMP) -> DOUBLE PRECISION

The function converts a postgres timestamp to modified julian date. This is naive; no corrections for timezones, let alone time scales or the like are done; you can thus not expect this to be good to second-precision unless you are careful in the construction of the timestamp.

ivo_nocasematch(value TEXT, pattern TEXT) -> INTEGER

ivo_nocasematch returns 1 if pattern matches value, 0 otherwise. pattern is defined as for the SQL LIKE operator, but the match is performed case-insensitively. This function in effect provides a surrogate for the ILIKE SQL operator that is missing from ADQL. On this site, this is actually implemented using python's and SQL's LOWER, so for everything except ASCII, your milage will vary.

ivo_hasword(haystack TEXT, needle TEXT) -> INTEGER

gavo_hasword returns 1 if needle shows up in haystack, 0 otherwise. This is for "google-like"-searches in text-like fields. In word, you can actually employ a fairly complex query language; see http://www.postgresql.org/docs/8.3/static/textsearch.html for details.

gavo_ipix(long REAL, lat REAL) -> BIGINT

gavo_ipix returns the q3c ipix for a long/lat pair (it simply wraps the 13c_ang2ipix function). This is probably only relevant when you play tricks with indices or PPMXL ids.

BOX

POINT

CIRCLE

POLYGON

REGION

CENTROID

COORD1

COORD2

DISTANCE

CONTAINS

INTERSECTS

AREA

LOWER

ILIKE

OFFSET

CAST

IN_UNIT

WITH

TABLESAMPLE

Written after a table reference, TABLESAMPLE(10) will make the database only use 10% of the rows; these are `somewhat random' in that the system will use random blocks. This should be good enough when just testing queries (and much better than using TOP n).

UNION

EXCEPT

INTERSECT

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rmsstat.valuefloatnullableapertif_dr1.raw_visibilitiestargetmeta.idcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullablebeammeta.idintfovdegphys.angSize;instr.fovfloatnullablecentral_frequencyMHzem.frequencyfloatnullablen_channelsmeta.numberintbandwidthMHzem.frequencyfloatnullablet_mintime.start;obs.exposurecharnullablet_maxtime.end;obs.exposurecharnullabledurationhtime.duration;obs.exposurefloatnullabletask_idmeta.idcharnullableobsidmeta.idcharnullabledataproduct_typemeta.idcharnullabledataproduct_subtypemeta.idcharnullableproduct_keymeta.idcharnullableequinoxmeta.textcharnullablequalitymeta.idcharnullablepub_didDataset identifier assigned by the publishermeta.id;meta.maincharnullableaccrefAccess url for the 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observationmeta.ref.urlcharnullablevalidWhether or not the dataset has passed validationmeta.code.qualchartask_idID of the taskmeta.idcharnullablebeam_numberNumber of the beammeta.id;instr.beamintfreqminMinimum frequencyMHzem.freqfloatfreqmaxMaximum frequencyMHzem.freqfloatn_channelsNumber of channelsem.binintpub_didDataset identifier assigned by the publishermeta.id;meta.maincharindexednullablesigma_inNoise in inner half degree of the imageuJy/beamstat.errorfloatsigma_outNoise at the edge of the residual image, more than a degree from the centreuJy/beamstat.errorfloatrsigma_in/sigma_outstat.error;arith.ratiofloatbminThe diameter of the FWHM minor axis of the synthesised beamarcsecphys.angsize;instr.beamfloatneg10The level at which the area covered by pixels with values below this level is 10 beams in units of sigma_outstat.valuefloatexneg2Area with values below -2 sigma_out in the inner 0.5 degree of the residual image in units of beam areaphys.angAreafloatapertif_dr1.source_catalognamemeta.id;meta.maincharnullablerathe right ascension of the source (for the equinox of the image)degpos.eq.ra;meta.maindoubleindexednullablee_rathe error on the right ascension of the sourcedegpos.eq.ra;stat.errordoublenullabledecthe declination of the source (for the equinox of the image)degpos.eq.dec;meta.maindoubleindexednullablee_decthe 1-sigma error on the declination of the sourcedegpos.eq.dec;stat.errordoublenullabletotal_fluxthe total, integrated Stokes I flux density of the source at the reference frequencymJydoublenullablee_total_fluxthe 1-sigma error on the total flux density of the sourcemJydoublenullablepeak_fluxthe peak Stokes I flux density per beam of the sourcemJy/beamdoublenullablee_peak_fluxthe 1-sigma error on the peak flux density per beam of the sourcemJy/beamdoublenullabledc_majthe FWHM of the deconvolved major axis of the sourcedegdoublenullablee_dc_majthe 1-sigma error on the FWHM of the deconvolved major axis of the sourcedegdoublenullabledc_minThe FWHM of the deconvolved minor axis of the sourcedegdoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcedegdoublenullabledc_pathe position angle of the deconvolved major axis of the source measured east of northdegdoublenullablee_dc_pathe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegdoublenullableisl_rmsthe average background rms value of the islandmJy/beamdoublenullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.codecharnullableapertif_dr2apertif_dr2.continuum_imagesaccrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegpos.eq.ra;meta.maindoublenullablecenterdeltaApproximate center of image, Decdegpos.eq.dec;meta.maindoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullabletargetName of the fieldmeta.idcharnullableobsidUnique idmeta.idcharnullablerelated_productsLink related products for the observationmeta.ref.urlcharnullablevalidWhether or not the dataset has passed validationmeta.code.qualchartask_idID of the taskmeta.idcharnullablebeam_numberNumber of the beammeta.id;instr.beamintfreqminMinimum frequencyMHzem.freqfloatfreqmaxMaximum frequencyMHzem.freqfloatn_channelsNumber of channelsem.binintpub_didDataset identifier assigned by the publishermeta.id;meta.maincharindexednullablesigma_inNoise in inner half degree of the imageuJy/beamstat.errorfloatsigma_outNoise at the edge of the residual image, more than a degree from the centreuJy/beamstat.errorfloatrsigma_in/sigma_outstat.error;arith.ratiofloatbminThe diameter of the FWHM minor axis of the synthesised beamarcsecphys.angsize;instr.beamfloatneg10The level at which the area covered by pixels with values below this level is 10 beams in units of sigma_outstat.valuefloatexneg2Area with values below -2 sigma_out in the inner 0.5 degree of the residual image in units of beam areaphys.angAreafloatapertif_dr2.beam_cubesaccrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection 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fieldmeta.idcharnullableobsidUnique idmeta.idcharnullablerelated_productsLink related products for the observationmeta.ref.urlcharnullablevalidWhether or not the dataset has passed validationmeta.code.qualchartask_idID of the taskmeta.idcharnullablebeam_numberNumber of the beammeta.id;instr.beamintfreqminMinimum frequencyMHzem.freqfloatfreqmaxMaximum frequencyMHzem.freqfloatn_channelsNumber of channelsem.binintpub_didDataset identifier assigned by the publishermeta.id;meta.maincharindexednullableapertif_dr2.pol_cubesaccrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegpos.eq.ra;meta.maindoublenullablecenterdeltaApproximate center of image, Decdegpos.eq.dec;meta.maindoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullabletargetName of the fieldmeta.idcharnullableobsidUnique idmeta.idcharnullablerelated_productsLink related products for the observationmeta.ref.urlcharnullablevalidWhether or not the dataset has passed validationmeta.code.qualchartask_idID of the taskmeta.idcharnullablebeam_numberNumber of the beammeta.id;instr.beamintfreqminMinimum frequencyMHzem.freqfloatfreqmaxMaximum frequencyMHzem.freqfloatn_channelsNumber of channelsem.binintpub_didDataset identifier assigned by the publishermeta.id;meta.maincharindexednullablepolarizationPolarization Stokesphys.polarization.stokescharnullablesigma_inNoise in inner half degree of the imageuJy/beamstat.errorcharsigma_outNoise at the edge of the residual image, more than a degree from the centreuJy/beamstat.errorcharft_maxMaximum of the absolute of a Fourier Transform of the imagestat.maxcharpeak_innerMaximum of the absolute pixel values in the inner half degree of the imageuJy/beamstat.maxcharbminThe diameter of the FWHM minor axis of the synthesised beamarcsecphys.angsize;instr.beamcharq_beam_fracFraction of Q image planes with beam minor axes less than 17.5’’stat.valuecharu_beam_fracFraction of U image planes with beam minor axes less than 17.5’’stat.valuecharq_noise_fracFraction of Q image planes with rms noise larger than 300 microJy/beamstat.valuecharu_noise_fracFraction of U image planes with rms noise larger than 300 microJy/beamstat.valuecharapertif_dr2.spectral_cubesaccrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegpos.eq.ra;meta.maindoublenullablecenterdeltaApproximate center of image, Decdegpos.eq.dec;meta.maindoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullabletargetName of the fieldmeta.idcharnullableobsidUnique idmeta.idcharnullablerelated_productsLink related products for the observationmeta.ref.urlcharnullablevalidWhether or not the dataset has passed validationmeta.code.qualchartask_idID of the taskmeta.idcharnullablebeam_numberNumber of the beammeta.id;instr.beamintfreqminMinimum frequencyMHzem.freqfloatfreqmaxMaximum frequencyMHzem.freqfloatn_channelsNumber of channelsem.binintpub_didDataset identifier assigned by the publishermeta.id;meta.maincharindexednullablecube_keymeta.idcharnullablecube_qualQuality flag (G: Good, O: Okay, B: Bad)meta.code.qualcharsigmarms noise in the central channelmJy/beamstat.errorfloatnullablef_exFraction of the total number of pixels with an absolute value > 6.75 sigmastat.valuefloatnullablep_0pt8Ratio between the width of the noise histogram at a level of 0.8% of the maximum and rmsstat.valuefloatnullableapertif_dr2.raw_visibilitiestargetmeta.idcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullablebeammeta.idintfovdegphys.angSize;instr.fovfloatnullablecentral_frequencyMHzem.frequencyfloatnullablen_channelsmeta.numberintbandwidthMHzem.frequencyfloatnullablet_mintime.start;obs.exposurecharnullablet_maxtime.end;obs.exposurecharnullabledurationhtime.duration;obs.exposurefloatnullabletask_idmeta.idcharnullableobsidmeta.idcharnullabledataproduct_typemeta.idcharnullabledataproduct_subtypemeta.idcharnullableproduct_keymeta.idcharnullableequinoxmeta.textcharnullablequalitymeta.idcharnullablepub_didDataset identifier assigned by the publishermeta.id;meta.maincharnullableaccrefAccess url for the dataAccess.Referencecharnullableapertif_dr2.flux_cal_visibilitiestargetmeta.idcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullablebeammeta.idintfovdegphys.angSize;instr.fovfloatnullablecentral_frequencyMHzem.frequencyfloatnullablen_channelsmeta.numberintbandwidthMHzem.frequencyfloatnullablet_mintime.start;obs.exposurecharnullablet_maxtime.end;obs.exposurecharnullabledurationhtime.duration;obs.exposurefloatnullabletask_idmeta.idcharnullableobsidmeta.idcharnullabledataproduct_typemeta.idcharnullabledataproduct_subtypemeta.idcharnullableproduct_keymeta.idcharnullableequinoxmeta.textcharnullablequalitymeta.idcharnullablepub_didDataset identifier assigned by the publishermeta.id;meta.maincharnullableaccrefAccess url for the dataAccess.Referencecharnullableused_forObservation calibrated with this calibratormeta.idcharnullableapertif_dr2.pol_cal_visibilitiestargetmeta.idcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullablebeammeta.idintfovdegphys.angSize;instr.fovfloatnullablecentral_frequencyMHzem.frequencyfloatnullablen_channelsmeta.numberintbandwidthMHzem.frequencyfloatnullablet_mintime.start;obs.exposurecharnullablet_maxtime.end;obs.exposurecharnullabledurationhtime.duration;obs.exposurefloatnullabletask_idmeta.idcharnullableobsidmeta.idcharnullabledataproduct_typemeta.idcharnullabledataproduct_subtypemeta.idcharnullableproduct_keymeta.idcharnullableequinoxmeta.textcharnullablequalitymeta.idcharnullablepub_didDataset identifier assigned by the publishermeta.id;meta.maincharnullableaccrefAccess url for the dataAccess.Referencecharnullableused_forObservation calibrated with this calibratormeta.idcharnullableapertif_dr2.calibrated_visibilitiestargetmeta.idcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullablebeammeta.idintfovdegphys.angSize;instr.fovfloatnullablecentral_frequencyMHzem.frequencyfloatnullablen_channelsmeta.numberintbandwidthMHzem.frequencyfloatnullablet_mintime.start;obs.exposurecharnullablet_maxtime.end;obs.exposurecharnullabledurationhtime.duration;obs.exposurefloatnullabletask_idmeta.idcharnullableobsidmeta.idcharnullabledataproduct_typemeta.idcharnullabledataproduct_subtypemeta.idcharnullableproduct_keymeta.idcharnullableequinoxmeta.textcharnullablequalitymeta.idcharnullablepub_didDataset identifier assigned by the publishermeta.id;meta.maincharnullableaccrefAccess url for the dataAccess.Referencecharnullableapertif_dr_bootesApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the catalogue and image observed by Apertif covering 26.5 square degree region in the Boötes constellation at 1.4 GHz. The image is a mosaic of 187 Apertif images from 8 different survey observations performed between April 2019 and November 2021. It has an angular resolution of 27×11.5 arcseconds and a median background noise of 40 μJy/beam. From this mosaic, 8994 sources were extracted and the catalogue is complete down to the 0.3 mJy level.apertif_dr_bootes.imagesApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the catalogue and image observed by Apertif covering 26.5 square degree region in the Boötes constellation at 1.4 GHz. The image is a mosaic of 187 Apertif images from 8 different survey observations performed between April 2019 and November 2021. It has an angular resolution of 27×11.5 arcseconds and a median background noise of 40 μJy/beam. From this mosaic, 8994 sources were extracted and the catalogue is complete down to the 0.3 mJy level.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullableapertif_dr_bootes.source_catalogApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the catalogue and image observed by Apertif covering 26.5 square degree region in the Boötes constellation at 1.4 GHz. The image is a mosaic of 187 Apertif images from 8 different survey observations performed between April 2019 and November 2021. It has an angular resolution of 27×11.5 arcseconds and a median background noise of 40 μJy/beam. From this mosaic, 8994 sources were extracted and the catalogue is complete down to the 0.3 mJy level.namemeta.id;meta.maincharnullablerathe right ascension of the source (for the equinox of the image)degpos.eq.ra;meta.maindoubleindexednullablee_rathe error on the right ascension of the sourcedegpos.eq.ra;stat.errordoublenullabledecthe declination of the source (for the equinox of the image)degpos.eq.dec;meta.maindoubleindexednullablee_decthe 1-sigma error on the declination of the sourcedegpos.eq.dec;stat.errordoublenullabletotal_fluxthe total, integrated Stokes I flux density of the source at the reference frequencymJydoublenullablee_total_fluxthe 1-sigma error on the total flux density of the sourcemJydoublenullablepeak_fluxthe peak Stokes I flux density per beam of the sourcemJy/beamdoublenullablee_peak_fluxthe 1-sigma error on the peak flux density per beam of the sourcemJy/beamdoublenullabledc_majthe FWHM of the deconvolved major axis of the sourcedegdoublenullablee_dc_majthe 1-sigma error on the FWHM of the deconvolved major axis of the sourcedegdoublenullabledc_minThe FWHM of the deconvolved minor axis of the sourcedegdoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcedegdoublenullabledc_pathe position angle of the deconvolved major axis of the source measured east of northdegdoublenullablee_dc_pathe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegdoublenullableisl_rmsthe average background rms value of the islandmJy/beamdoublenullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.codecharnullableapertif_elaisApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the ELAIS-N field observed with Apertif. The image covers 25 square degree region, has an angular resolution of 18x11 arcseconds and a median background noise of 37 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level,includes 8526 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/apertif_elais.imagesApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the ELAIS-N field observed with Apertif. The image covers 25 square degree region, has an angular resolution of 18x11 arcseconds and a median background noise of 37 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level,includes 8526 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullableapertif_elais.source_catalogApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the ELAIS-N field observed with Apertif. The image covers 25 square degree region, has an angular resolution of 18x11 arcseconds and a median background noise of 37 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level,includes 8526 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/namemeta.id;meta.maincharnullablerathe right ascension of the source (for the equinox of the image)degpos.eq.ra;meta.mainfloatindexednullablee_rathe error on the right ascension of the sourcedegpos.eq.ra;stat.errorfloatnullabledecthe declination of the source (for the equinox of the image)degpos.eq.dec;meta.mainfloatindexednullablee_decthe 1-sigma error on the declination of the sourcedegpos.eq.dec;stat.errorfloatnullabletotal_fluxthe total, integrated Stokes I flux density of the source at the reference frequencymJyfloatnullablee_total_fluxthe 1-sigma error on the total flux density of the sourcemJyfloatnullablepeak_fluxthe peak Stokes I flux density per beam of the sourcemJy/beamfloatnullablee_peak_fluxthe 1-sigma error on the peak flux density per beam of the sourcemJy/beamfloatnullableisl_rmsthe average background rms value of the islandmJy/beamfloatnullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.codecharnullableapertif_lockmanApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/apertif_lockman.imagesApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullableapertif_lockman.source_catalogApertif is a phased-array feed system for the Westerbork Synthesis Radio Telescope (WSRT), operating at 1.4 GHz and providing forty instantaneous beams over 300 MHz of bandwidth. This data release includes the image of the Lockman Hole field observed with Apertif. The image covers 136 square degree region, has an angular resolution of 15x13 arcseconds and a median background noise of 27 μJy/beam. The corresponding source catalog, complete down to the 0.3 mJy level, includes 55166 sources. https://science.astron.nl/telescopes/wsrt-apertif/apertif-data-access/data-releases/apertif-single-fields/namemeta.id;meta.maincharnullablerathe right ascension of the source (for the equinox of the image)degpos.eq.ra;meta.mainfloatindexednullablee_rathe error on the right ascension of the sourcedegpos.eq.ra;stat.errorfloatnullabledecthe declination of the source (for the equinox of the image)degpos.eq.dec;meta.mainfloatindexednullablee_decthe 1-sigma error on the declination of the sourcedegpos.eq.dec;stat.errorfloatnullabletotal_fluxthe total, integrated Stokes I flux density of the source at the reference frequencymJyfloatnullablee_total_fluxthe 1-sigma error on the total flux density of the sourcemJyfloatnullablepeak_fluxthe peak Stokes I flux density per beam of the sourcemJy/beamfloatnullablee_peak_fluxthe 1-sigma error on the peak flux density per beam of the sourcemJy/beamfloatnullableisl_rmsthe average background rms value of the islandmJy/beamfloatnullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.codecharnullablearts_dr1 This is the first release (DR1) of data from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performs real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reaches coherent-addition sensitivity over the entire field of the view of the primary- dish beam. After commissioning results verified the system performed as planned, we initiated the Apertif FRB survey (ALERT). Over the first 5 weeks we observed at design sensitivity in 2019, we detected 5 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, and unscattered. Dispersion measures are generally high. Please note that the ARTS DR1 collection available from this end-point is superseded by the ARTS DR2 collection. DR2 includes all data from the DR1 collection that can be queried here.arts_dr1.frb_obs This is the first release (DR1) of data from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performs real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reaches coherent-addition sensitivity over the entire field of the view of the primary- dish beam. After commissioning results verified the system performed as planned, we initiated the Apertif FRB survey (ALERT). Over the first 5 weeks we observed at design sensitivity in 2019, we detected 5 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, and unscattered. Dispersion measures are generally high. Please note that the ARTS DR1 collection available from this end-point is superseded by the ARTS DR2 collection. DR2 includes all data from the DR1 collection that can be queried here.targetName of the observed targetcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullabletime_mindtime.start;obs.exposuredoublenullabletime_maxdtime.end;obs.exposuredoublenullabledetection1 if an FRB was detected, 0 for a non-detection.intfrbName of the FRB if detected, linking to the FRB properties. None if non-detection.charnullableobs_titlemeta.id;meta.maincharnullableobsidID of the data setcharnullablecompound_beaminttied_array_beamintt_exptimestime.duration;obs.exposurefloatnullabletime_stepsintfilesizekbytephys.size;meta.fileintaccrefmeta.ref.urlAccess.Referencecharnullablefile_referencecharnullablemimetypemeta.code.mimecharnullablepub_didcharnullablearts_dr1.frb_det This is the first release (DR1) of data from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performs real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reaches coherent-addition sensitivity over the entire field of the view of the primary- dish beam. After commissioning results verified the system performed as planned, we initiated the Apertif FRB survey (ALERT). Over the first 5 weeks we observed at design sensitivity in 2019, we detected 5 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, and unscattered. Dispersion measures are generally high. Please note that the ARTS DR1 collection available from this end-point is superseded by the ARTS DR2 collection. DR2 includes all data from the DR1 collection that can be queried here.targetName of the observed targetcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullabletime_mindtime.start;obs.exposuredoublenullabletime_maxdtime.end;obs.exposuredoublenullabledetection1 if an FRB was detected, 0 for a non-detection.intfrbName of the FRB if detected, linking to the FRB properties. None if non-detection.charnullableobs_titlemeta.id;meta.maincharnullableobsidID of the data setcharnullablecompound_beaminttied_array_beamintt_exptimestime.duration;obs.exposurefloatnullabletime_stepsintfilesizekbytephys.size;meta.fileintaccrefmeta.ref.urlAccess.Referencecharnullablefile_referencecharnullablemimetypemeta.code.mimecharnullablepub_didcharnullablearts_dr2 This is the final, full data release from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performed real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reached coherent-addition sensitivity over the entire field of the view of the primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, with high dispersion measures.arts_dr2.frb_obs This is the final, full data release from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performed real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reached coherent-addition sensitivity over the entire field of the view of the primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, with high dispersion measures.targetName of the observed targetcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullabletime_mindtime.start;obs.exposuredoublenullabletime_maxdtime.end;obs.exposuredoublenullabledetection1 if an FRB was detected, 0 for a non-detection.intfrbName of the FRB if detected, linking to the FRB properties. None if non-detection.charnullableobs_titlemeta.id;meta.maincharnullableobsidID of the data setcharnullablecompound_beaminttied_array_beamintt_exptimestime.duration;obs.exposurefloatnullabletime_stepsintfilesizekbytephys.size;meta.fileintaccrefmeta.ref.urlAccess.Referencecharnullablefile_referencecharnullablemimetypemeta.code.mimecharnullablepub_didcharnullablearts_dr2.frb_det This is the final, full data release from the Apertif Radio Transient System (ARTS), a supercomputing radio-telescope instrument that performed real-time FRB detection and localisation on the Westerbork Synthesis Radio Telescope (WSRT) interferometer. It reached coherent-addition sensitivity over the entire field of the view of the primary- dish beam. The Apertif FRB survey (ALERT) detected 24 new FRBs, and interferometrically localised each of these to 0.4−10 sq. arcmin. All detections are broad band and very narrow, of order 1 ms duration, with high dispersion measures.targetName of the observed targetcharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullabletime_mindtime.start;obs.exposuredoublenullabletime_maxdtime.end;obs.exposuredoublenullabledetection1 if an FRB was detected, 0 for a non-detection.intfrbName of the FRB if detected, linking to the FRB properties. None if non-detection.charnullableobs_titlemeta.id;meta.maincharnullableobsidID of the data setcharnullablecompound_beaminttied_array_beamintt_exptimestime.duration;obs.exposurefloatnullabletime_stepsintfilesizekbytephys.size;meta.fileintaccrefmeta.ref.urlAccess.Referencecharnullablefile_referencecharnullablemimetypemeta.code.mimecharnullablepub_didcharnullablehetdex This service queries the catalog of radio sources from the LOFAR Two-metre Sky Survey First Data Release (LoTSS-DR1). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field (right ascension 10h45m00s to15h30m00s and declination 45◦00′00′′ to 57◦00′00′′). A total of 325,694 radio sources are detected in a region covering 424 square degrees. The maps have a median sensitivity of 71 uJy/beam and a resolution of 6 arcsec. Optical counterparts for 71% of the radio sources have been identified and where possible photometric redshifts for these sources have been derived.hetdex.hetdex_images This service queries the catalog of images from the LOFAR Two-metre Sky Survey First Data Release (LoTSS-DR1). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field (right ascension 10h45m00s to15h30m00s and declination 45◦00′00′′ to 57◦00′00′′). A total of 325,694 radio sources are detected in a region covering 424 square degrees. The maps have a median sensitivity of 71 uJy/beam and a resolution of 6 arcsec. Optical counterparts for 71% of the radio sources have been identified and where possible photometric redshifts for these sources have been derived.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablehetdex.main_merged This service queries the catalog of radio sources from the LOFAR Two-metre Sky Survey First Data Release (LoTSS-DR1) that have been cross-matched with an optical or infrared counterpart. This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field (right ascension 10h45m00s to15h30m00s and declination 45◦00′00′′ to 57◦00′00′′). A total of 325,694 radio sources are detected in a region covering 424 square degrees. The maps have a median sensitivity of 71 uJy/beam and a resolution of 6 arcsec. Optical counterparts for 71% of the radio sources have been identified and where possible photometric redshifts for these sources have been derived.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharindexedprimaryraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoublepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamdoublenullablee_peak_fluxThe 1-σ error on the peak flux density per beam of the sourcemJy/beamdoublenullabletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJydoublenullablee_total_fluxThe 1-σ on the total flux density of the sourcemJydoublenullablemajorThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_majThe 1-σ error on the FWHM of the major axis of the sourcearcsecdoublenullableminorThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_minThe 1-σ error on the FWHM of the minor axis of the sourcearcsecdoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_dc_majThe 1-σ error on the FWHM of the deconvolved major axis of the sourcearcsecdoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_dc_minThe 1-σ error on the FWHM of the deconvolved minor axis of the sourcearcsecdoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegdoublenullablee_paThe 1-σ error on the position angle of the major axis of the sourcedegdoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegdoublenullablee_dc_paThe 1-σ error on the position angle of the deconvolved major axis of the sourcedegdoublenullableisl_rmsThe average background rms value of the islandmJy/beamdoublenullables_codeA code the defines the source structure in terms of the fitted Gaussian components: ’S’ indicates an isolated source that is fit with a single Gaussian; ‘C’ represents sources that are fit by a single Gaussian but are within an island of emission that also contains other sources; and ‘M’ is used for sources with are extended and fit with multiple Gaussians.charnullablemosaic_idThe name of the HETDEX mosaic in which the FITS image can be foundcharnullablemasked_fractionThe fraction of the source that is in the CLEAN maskdoublenullableid_flagFlag indicating the origin of the optical identification. 0 - no ID possible (too large or otherwise difficult) 1 - identification (or alck thereof) from maximum likelihood analysis 2 - match to a bright galaxy (either 2MASX or SDSS) 3? - association and identification (or lack therof) from LGZ, second digit is further flag 31 - output from LGZ 32 - output from LGZ (too-zoomed-in) 4? - association and identification (or lack therof) through deblend workflow 41 - deblend following flowchart classification of m sources 42 - deblend following LGintnullableid_namePanSTARRs, AllWISE, 2MASX or SDSS name of optical identificationmeta.idcharnullableid_raRight ascension of optical identificationdegpos.eq.radoublenullableid_decDeclination of optical identificationdegpos.eq.decdoublenullableml_lrLikelihood ratio from maximum likelihood analysisdoublenullablelgz_sizeLength of the largest diameter of the convex hull around the set of component elliptical Gaussiansarcsecdoublenullablelgz_widthTwice the maximum perpendicular distance of points on the convex hull to the largest diameter linearcsecdoublenullablelgz_paThe position angle on the sky, measured east of north, of that largest diameterdegdoublenullablelgz_assocNumber of sources in the LGZ associationdoublenullablelgz_assoc_qualLGZ association quality flagdoublenullablelgz_id_qualLGZ identification quality flagdoublenullabledeblended_fromName of PyBDSF multiple Gaussian component source from which this source was deblendedcharnullableallwiseName of the source in the AllWISE cataloguemeta.idcharnullableobjidThe PanSTARRs object IDmeta.idcharnullablegfapfluxPanSTARRs g-band forced aperture photometry fluxuJydoublenullablegfapfluxerrPanSTARRs g-band forced aperture photometry flux erroruJydoublenullablegfapmagPanSTARRs g-band forced aperture photometry magnitudemagdoublenullablegfapmagerrPanSTARRs g-band forced aperture photometry magnitude errormagdoublenullablerfapfluxPanSTARRs r-band forced aperture photometry fluxuJydoublenullablerfapfluxerrPanSTARRs r-band forced aperture photometry flux erroruJydoublenullablerfapmagPanSTARRs r-band forced aperture photometry magnitudemagdoublenullablerfapmagerrPanSTARRs r-band forced aperture photometry magnitude errormagdoublenullableifapfluxPanSTARRs i-band forced aperture photometry fluxuJydoublenullableifapfluxerrPanSTARRs i-band forced aperture photometry flux erroruJydoublenullableifapmagPanSTARRs i-band forced aperture photometry magnitudemagdoublenullableifapmagerrPanSTARRs i-band forced aperture photometry magnitude errormagdoublenullablezfapfluxPanSTARRs z-band forced aperture photometry fluxuJydoublenullablezfapfluxerrPanSTARRs z-band forced aperture photometry flux erroruJydoublenullablezfapmagPanSTARRs z-band forced aperture photometry magnitudemagdoublenullablezfapmagerrPanSTARRs z-band forced aperture photometry magnitude errormagdoublenullableyfapfluxPanSTARRs y-band forced aperture photometry fluxuJydoublenullableyfapfluxerrPanSTARRs y-band forced aperture photometry flux erroruJydoublenullableyfapmagPanSTARRs y-band forced aperture photometry magnitudemagdoublenullableyfapmagerrPanSTARRs y-band forced aperture photometry magnitude errormagdoublenullablegfkronfluxPanSTARRs g-band forced photometry Kron fluxuJydoublenullablegfkronfluxerrPanSTARRs g-band forced photometry Kron flux erroruJydoublenullablerfkronfluxPanSTARRs r-band forced photometry Kron fluxuJydoublenullablerfkronfluxerrPanSTARRs r-band forced photometry Kron flux erroruJydoublenullableifkronfluxPanSTARRs i-band forced photometry Kron fluxuJydoublenullableifkronfluxerrPanSTARRs i-band forced photometry Kron flux erroruJydoublenullablezfkronfluxPanSTARRs z-band forced photometry Kron fluxuJydoublenullablezfkronfluxerrPanSTARRs z-band forced photometry Kron flux erroruJydoublenullableyfkronfluxPanSTARRs y-band forced photometry Kron fluxuJydoublenullableyfkronfluxerrPanSTARRs y-band forced photometry Kron flux erroruJydoublenullablew1fluxAllWISE W1 profile-fit photometry fluxuJydoublenullablew1fluxerrAllWISE W1 profile-fit photometry flux erroruJydoublenullablew1magAllWISE W1 profile-fit photometry magnitudemagdoublenullablew1magerrAllWISE W1 profile-fit photometry magnitude errormagdoublenullablew2fluxAllWISE W1 profile-fit photometry fluxuJydoublenullablew2fluxerrAllWISE W1 profile-fit photometry flux erroruJydoublenullablew2magAllWISE W1 profile-fit photometry magnitudemagdoublenullablew2magerrAllWISE W1 profile-fit photometry magnitude errormagdoublenullablew3fluxAllWISE W1 profile-fit photometry fluxuJydoublenullablew3fluxerrAllWISE W1 profile-fit photometry flux erroruJydoublenullablew3magAllWISE W1 profile-fit photometry magnitudemagdoublenullablew3magerrAllWISE W1 profile-fit photometry magnitude errormagdoublenullablew4fluxAllWISE W1 profile-fit photometry fluxuJydoublenullablew4fluxerrAllWISE W1 profile-fit photometry flux erroruJydoublenullablew4magAllWISE W1 profile-fit photometry magnitudemagdoublenullablew4magerrAllWISE W1 profile-fit photometry magnitude errormagdoublenullablez_bestBest available redshift estimatedoublenullablez_best_sourceSource of z_best, 0 = photometric, 1 = spectroscopicdoublenullablez_specLiterature Spectroscopic Redshiftdoublenullablez_spec_sourceSource of z_spec, 1 = SDSS, 2 = DEEP 2/3, 4 = 3D-HST, 8 = Steidel et al. (2003), 16 = AEGIS-X, 32 = Huang et al. (2009)doublenullablez1_medianMedian of the primary redshift peak above 80% HPD CIdoublenullablez1_minLower bound of the primary 80% HPD CI peakdoublenullablez1_maxUpper bound of the primary 80% HPD CI peakdoublenullablez1_areaIntegrated area of the primary 80% HPD CI peakdoublenullablez2_medianMedian of the secondary redshift peak (if present) above 80% HPD CIdoublenullablez2_minLower bound of the secondary 80% HPD CI peakdoublenullablez2_maxUpper bound of the secondary 80% HPD CI peakdoublenullablez2_areaIntegrated area of the secondary 80% HPD CI peakdoublenullablespecagnFlag indicating spectroscopically identified AGNcharnullablemqcagnFlag indicating source is included in Million Quasar Catalog compilationcharnullablexrayclass2RXS or XMMSL2 X-ray source class: 1=AGN, 2=Galaxy/Star (based on criteria in Salvato+2017)doublenullable_2rxs_idID in 2RXS catalog (if available)charnullablexmmsl2_idID in XMMSL2 catalogcharnullableirclassBit-flag indicating WISE AGN Class based on Assef+2012 selection criteria. 1 - 90% Completeness criteria, 2 - 75% Completeness criteria, 4 - 75% Reliability criteria, 8 - 90% Reliability criteriashortnullableebvE(B-V) galactic extinction for the source based on its position and Schlegel, Finkbeiner and Davis (1998) extinction maps - http://argonaut.skymaps.info. Fluxes and magnitudes in the catalog have already been corrected based on this value.doublenullablepanstarrs_missingBoolean flag indicating source has no PS1 FAp available (and hence may be missing ID/photo-z)shortnullableu_restEstimated rest frame u-band magnitude (for z_best)magdoublenullableg_restEstimated rest frame g-band magnitude (for z_best)magdoublenullabler_restEstimated rest frame r-band magnitude (for z_best)magdoublenullablei_restEstimated rest frame i-band magnitude (for z_best)magdoublenullablez_restEstimated rest frame z-band magnitude (for z_best)magdoublenullableu__restEstimated rest frame U-band magnitude (for z_best)magdoublenullableb_restEstimated rest frame B-band magnitude (for z_best)magdoublenullablev_restEstimated rest frame V-band magnitude (for z_best)magdoublenullablei__restEstimated rest frame I-band magnitude (for z_best)magdoublenullablej_restEstimated rest frame J-band magnitude (for z_best)magdoublenullableks_restEstimated rest frame Ks-band magnitude (for z_best)magdoublenullablew1_restEstimated rest frame w1-band magnitude (for z_best)magdoublenullablew2_restEstimated rest frame w2-band magnitude (for z_best)magdoublenullablew3_restEstimated rest frame w3-band magnitude (for z_best)magdoublenullablehetdex.main This service queries the catalog of radio sources from the LOFAR Two-metre Sky Survey First Data Release (LoTSS-DR1). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field (right ascension 10h45m00s to15h30m00s and declination 45◦00′00′′ to 57◦00′00′′). A total of 325,694 radio sources are detected in a region covering 424 square degrees. The maps have a median sensitivity of 71 uJy/beam and a resolution of 6 arcsec. Optical counterparts for 71% of the radio sources have been identified and where possible photometric redshifts for these sources have been derived.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharindexedprimaryraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoublepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamdoublenullablee_peak_fluxThe 1-σ error on the peak flux density per beam of the sourcemJy/beamdoublenullabletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJydoublenullablee_total_fluxThe 1-σ error on the total flux density of the sourcemJydoublenullablemajThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_majThe 1-σ error on the FWHM of the major axis of the sourcearcsecdoublenullableminorThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_minThe 1-σ error on the FWHM of the minor axis of the sourcearcsecdoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_dc_majThe 1-σ error on the FWHM of the deconvolved major axis of the sourcearcsecdoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecdoublenullablee_dc_minThe 1-σ error on the FWHM of the deconvolved minor axis of the sourcearcsecdoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegdoublenullablee_paThe 1-σ error on the position angle of the major axis of the sourcedegdoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegdoublenullablee_dc_paThe 1-σ error on the position angle of the deconvolved major axis of the sourcearcsecdoublenullableisl_rmsThe average background rms value of the islandmJy/beamdoublenullables_codeA code that defines the source structure in terms of the fitted Gaussian components: ’S’ indicates an isolated source that is fit with a single Gaussian; ‘C’ represents sources that are fit by a single Gaussian but are within an island of emission that also contains other sources; and ‘M’ is used for sources with are extended and fit with multiple Gaussians.charnullablemosaic_idThe name of the HETDEX mosaic in which the FITS image can be foundcharnullablenumber_pointingsThe number of pointings that are mosaiced at the position of the source.doublenullablenumber_maskedThe fraction of pointings in which the source is in the deconvolution mask.doublenullablemasked_fractionThe fraction of the source that is in the CLEAN mask.doublenullableartefaceWhether or not the entry is believed to be an artefact.booleannullableivoaDefinition and support code for the ObsCore data model and table.ivoa.obscoreThe IVOA-defined obscore table, containing generic metadata for datasets within this datacenter.dataproduct_typeHigh level scientific classification of the data product, taken from an enumerationmeta.idobscore:obsdataset.dataproducttypecharnullabledataproduct_subtypeData product specific typemeta.idobscore:obsdataset.dataproductsubtypecharnullablecalib_levelAmount of data processing that has been applied to the datameta.code;obs.calibobscore:obsdataset.caliblevelshortobs_collectionName of a data collection (e.g., project name) this data belongs tometa.idobscore:dataid.collectioncharnullableobs_idUnique identifier for an observationmeta.idobscore:DataID.observationIDcharnullableobs_titleFree-from title of the data setmeta.title;obsobscore:dataid.titlecharnullableobs_publisher_didDataset identifier assigned by the publisher.meta.ref.uri;meta.curationobscore:curation.publisherdidcharnullableobs_creator_didDataset identifier assigned by the creator.meta.idobscore:dataid.creatordidcharnullableaccess_urlThe URL at which to obtain the data set.meta.ref.urlobscore:access.referencecharnullableaccess_formatMIME type of the resource at access_urlmeta.code.mimeobscore:access.formatcharnullableaccess_estsizeEstimated size of data productkbytephys.size;meta.fileobscore:access.sizelongnullabletarget_nameObject a targeted observation targetedmeta.id;srcobscore:Target.Namecharnullabletarget_classClass of the target object (star, QSO, ...)src.classobscore:target.classcharnullables_raRA of (center of) observation, ICRSdegpos.eq.raobscore:char.spatialaxis.coverage.location.coord.position2d.value2.c1doublenullables_decDec of (center of) observation, ICRSdegpos.eq.decobscore:char.spatialaxis.coverage.location.coord.position2d.value2.c2doublenullables_fovApproximate spatial extent for the region covered by the observationdegphys.angSize;instr.fovobscore:char.spatialaxis.coverage.bounds.extent.diameterdoublenullables_regionRegion covered by the observation, as a polygonpos.outline;obs.fieldobscore:char.spatialaxis.coverage.support.areacharnullables_resolutionBest spatial resolution within the data setarcsecpos.angResolutionobscore:Char.SpatialAxis.Resolution.refval.valuedoublenullablet_minLower bound of times represented in the data set, as MJDdtime.start;obs.exposureobscore:char.timeaxis.coverage.bounds.limits.starttimedoublenullablet_maxUpper bound of times represented in the data set, as MJDdtime.end;obs.exposureobscore:char.timeaxis.coverage.bounds.limits.stoptimedoublenullablet_exptimeTotal exposure timestime.duration;obs.exposureobscore:char.timeaxis.coverage.support.extentfloatnullablet_resolutionMinimal significant time interval along the time axisstime.resolutionobscore:char.timeaxis.resolution.refval.valuefloatnullableem_minMinimal wavelength represented within the data setmem.wl;stat.minobscore:char.spectralaxis.coverage.bounds.limits.lolimitdoublenullableem_maxMaximal wavelength represented within the data setmem.wl;stat.maxobscore:char.spectralaxis.coverage.bounds.limits.hilimitdoublenullableem_res_powerSpectral resolving power delta lambda/lamdaspect.resolutionobscore:char.spectralaxis.resolution.resolpower.refvaldoublenullableo_ucdUCD for the product's observablemeta.ucdobscore:char.observableaxis.ucdcharnullablepol_statesList of polarization states in the data setmeta.code;phys.polarizationobscore:Char.PolarizationAxis.stateListcharnullablefacility_nameName of the facility at which data was takenmeta.id;instr.telobscore:Provenance.ObsConfig.facility.namecharnullableinstrument_nameName of the instrument that produced the datameta.id;instrobscore:Provenance.ObsConfig.instrument.namecharnullables_xel1Number of elements (typically pixels) along the first spatial axis.meta.numberobscore:Char.SpatialAxis.numBins1longnullables_xel2Number of elements (typically pixels) along the second spatial axis.meta.numberobscore:Char.SpatialAxis.numBins2longnullablet_xelNumber of elements (typically pixels) along the time axis.meta.numberobscore:Char.TimeAxis.numBinslongnullableem_xelNumber of elements (typically pixels) along the spectral axis.meta.numberobscore:Char.SpectralAxis.numBinslongnullablepol_xelNumber of elements (typically pixels) along the polarization axis.meta.numberobscore:Char.PolarizationAxis.numBinslongnullables_pixel_scaleSampling period in world coordinate units along the spatial axisarcsecphys.angSize;instr.pixelobscore:Char.SpatialAxis.Sampling.RefVal.SamplingPerioddoublenullableem_ucdNature of the product's spectral axismeta.ucdobscore:Char.SpectralAxis.ucdcharnullablepreviewURL of a preview (low-resolution, quick-to-retrieve representation) of the data.meta.ref.url;datalink.previewcharnullablesource_tableName of a TAP-queriable table this data originates from. This source table usually provides more information on the the data than what is given in obscore. See the TAP_SCHEMA of the originating TAP server for details.meta.id;meta.tablecharnullablelbcs This service queries the catalog of calibrators from the LOFAR Long-Baseline Calibrator Survey (LBCS). The LBCS aims to identify sources suitable for calibrating the highest-resolution observations made with the International LOFAR Telescope, which include baselines >1000 km. Suitable sources must contain significant correlated flux density (>50-100 mJy) at frequencies around 110-190 MHz on scales of a few hundred milliarcseconds. If you use this data, cite Jackson et al. 2016 (A&A 595A, 86J). For a description of the catalog format, see https://www.jb.man.ac.uk/~njj/lbcs_stats.sum.lbcs.main This service queries the catalog of calibrators from the LOFAR Long-Baseline Calibrator Survey (LBCS). The LBCS aims to identify sources suitable for calibrating the highest-resolution observations made with the International LOFAR Telescope, which include baselines >1000 km. Suitable sources must contain significant correlated flux density (>50-100 mJy) at frequencies around 110-190 MHz on scales of a few hundred milliarcseconds. If you use this data, cite Jackson et al. 2016 (A&A 595A, 86J). For a description of the catalog format, see https://www.jb.man.ac.uk/~njj/lbcs_stats.sum.obsidLOFAR Observation IDmeta.id;meta.maincharindexedprimaryraj2000Source J2000 Right Ascension, in decimal degrees.degpos.eq.ra;meta.maindoubleindexeddecj2000Source J2000 Declination, in decimal degrees.degpos.eq.dec;meta.maindoubleindexedobsdateObservation date.time.epoch;obscharobstimeObservation time.time.epoch;obscharbaselinequalGoodness of the calibrator on the international stations, judged by signal-to-noise ratio of the fringe fit.charobsqualQuality of the observation, judged by the percentage of source detections on the shorter baselines.shortbaselinequalftGoodness of the calibrator on the international stations, judged by signal-to-noise of the Fourier transform of the data.charobsflagObservation flag.charlofartier1 This service queries the catalog of radio sources from the LOFAR HBA Tier-1 preliminary data release (LoTSS-PDR). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field. In excess of 40,000 sources are detected in the images that cover an area of over 350 square degrees, have a resolution of 25 arcsec, and typical noise levels of less than 0.5 mJy/beam.lofartier1.img_main This service queries the catalog of images from the LOFAR HBA Tier-1 preliminary data release (LoTSS-PDR). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field. In excess of 40,000 sources are detected in the images that cover an area of over 350 square degrees, have a resolution of 25 arcsec, and typical noise levels of less than 0.5 mJy/beam.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablelofartier1.main This service queries the catalog of radio sources from the LOFAR HBA Tier-1 preliminary data release (LoTSS-PDR). This data release contains images and catalogs that characterise the low-frequency radio emission in the region of the HETDEX Spring Field. In excess of 40,000 sources are detected in the images that cover an area of over 350 square degrees, have a resolution of 25 arcsec, and typical noise levels of less than 0.5 mJy/beam.source_idSource ID, formed as Jhhmmss+ddmmss using the IAU convention.meta.id;meta.maincharindexedprimaryraSource J2000 Right Ascension, in decimal degrees.degpos.eq.ra;meta.maindoubleindexede_raError in source J2000 Right Ascension, in arcseconds This is the formal error based on the source position fit.arcsecstat.error;pos.eq.radoublee_ra_totError in source J2000 Right Ascension, in arc seconds. This includes the formal error based on the source position fit and the systematic positional error.arcsecstat.error;pos.eq.radoubledecSource J2000 Declination, in decimal degrees.degpos.eq.dec;meta.maindoubleindexede_decError in source J2000 Declination, in arcseconds This is the formal error based on the source position fit.arcsecstat.error;pos.eq.decdoublee_dec_totTotal error in source J2000 Declination, in arc seconds. This includes the formal error based on the source position fit and the systematic positional error.arcsecstat.error;pos.eq.decdoublepeak_fluxSource peak flux density, in mJy/beammJy/beamdoublenullablee_peak_fluxError in the source peak flux density in mJy/beam. This is the formal error based on the source position fit.mJy/beamdoublenullablee_peak_flux_totTotal error in the source peak flux density in mJy/beam. This includes the formal error based on the source position fit and the flux.mJy/beamdoublenullabletotal_fluxSource integrated flux density, in mJymJydoublenullablee_total_fluxError in the source integrated flux density in mJy. This is the formal error based on the source position fit.mJydoublenullablee_total_flux_totTotal error in the source integrated flux density in Jy. This includes the formal error based on the source position fit and the flux.mJydoublenullableisl_rmsThe local rms noise in mJy/beammJy/beamdoublenullables_codeA code the defines the source structure in terms of the fitted Gaussian components: ’S’ indicates an isolated source that is fit with a single Gaussian; ‘C’ represents sources that are fit by a single Gaussian but are within an island of emission that also contains other sources; and ‘M’ is used for sources with are extended and fit with multiple Gaussians.charnullablemosaic_idThe name of the mosaic from which the the source entry was extracted.charnullablelolss This page provides public access to the LBA survey of HETDEX, as a single mosaic over the HETDEX field and associated catalogue, covering around 700 square degrees centered in the RA range 10h45m00s to 15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are detected and the rms noise level is around 4 mJy/beam at a resolution of 47 arcsec and an effective frequency of 54 MHz. The flux scale appears to be good based on a comparison with VLSS.lolss.mosaic This page provides public access to the LBA survey of HETDEX, as a single mosaic over the HETDEX field and associated catalogue, covering around 700 square degrees centered in the RA range 10h45m00s to 15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are detected and the rms noise level is around 4 mJy/beam at a resolution of 47 arcsec and an effective frequency of 54 MHz. The flux scale appears to be good based on a comparison with VLSS.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablelolss.source_catalog This page provides public access to the LBA survey of HETDEX, as a single mosaic over the HETDEX field and associated catalogue, covering around 700 square degrees centered in the RA range 10h45m00s to 15h30m00s and DEC range 45d00m00s to 57d00m00s. 25,247 sources are detected and the rms noise level is around 4 mJy/beam at a resolution of 47 arcsec and an effective frequency of 54 MHz. The flux scale appears to be good based on a comparison with VLSS.sourcemeta.id;meta.maincharnullableradegpos.eq.ra;meta.mainfloatindexednullabledecdegpos.eq.dec;meta.mainfloatindexednullablee_raarcsecpos.eq.ra;stat.errorfloatnullablee_decarcsecpos.eq.dec;stat.errorfloatnullabletot_fluxIntegrated flux densitymJyfloatnullablee_tot_fluxError on the integrated flux densitymJyfloatnullablepeak_fluxPeak brightness (affected by smearing)mJy/beamfloatnullablee_peak_fluxError on peak brightnessmJy/beamfloatnullablemaj_axisSource size, major axisarcsecfloatnullablee_majError on the major axis sizearcsecfloatnullablemin_axisSource size, minor axisarcsecfloatnullablee_minError on the minor axis sizearcsecfloatnullablepadegfloatnullablee_padegfloatnullabledc_majDeconvolved source size, major axisarcsecfloatnullablee_dc_majError on the deconvolved major axis sizearcsecfloatnullabledc_minDeconvolved source size, minor axisarcsecfloatnullablee_dc_minError on the deconvolved minor axis sizearcsecfloatnullabledc_padegfloatnullablee_dc_padegfloatnullableisl_rmsmJy/beamfloatnullables_code`S' indicates an isolated source which is fit with a single Gaussian; `C' represents sources that are fit by a single Gaussian but are within an island of emission that also contains other sources; and `M' is used for sources which are extended and fitted with multiple Gaussiansmeta.codecharnullablelotss_dr2 In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.lotss_dr2.main_sources In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoublepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamphot.flux.density;em.radiodoublenullablee_peak_fluxThe 1-sigma error on the peak flux density per beam of the sourcemJy/beamstat.error;phot.flux.density;em.radiodoublenullabletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJyphot.flux.density;em.radiodoublenullablee_total_fluxThe 1-sigma on the total flux density of the sourcemJystat.error;phot.flux.density;em.radiodoublenullablemajaxThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_majThe 1-sigma error on the FWHM of the major axis of the sourcearcsecstat.error;phys.angsizedoublenullableminaxThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_minThe 1-sigma error on the FWHM of the minor axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_majThe 1-sigma error on the FWHM of the deconvolved major axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcearcsecstat.error;phys.angsizedoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_paThe 1-sigma error on the position angle of the major axis of the sourcedegstat.error;pos.posangdoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_dc_paThe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegstat.error;pos.posangdoublenullableisl_rmsThe average background rms value of the islandmJy/beaminstr.det.noisedoublenullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.code;src.morphcharnullablemosaic_idThe name of the mosaic in which the FITS image can be foundmeta.id;obs.imagecharnullablemosaic_urlDataLink to the corresponding mosaicmeta.id;obs.imagecharnullablenumber_pointingsNumber of pointings that are mosaiced at the position of the source.meta.numberintmasked_fractionThe fraction of the source that is in the CLEAN maskdoublenullablelotss_dr2.main_gausses In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoublepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamphot.flux.density;em.radiodoublenullablee_peak_fluxThe 1-sigma error on the peak flux density per beam of the sourcemJy/beamstat.error;phot.flux.density;em.radiodoublenullabletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJyphot.flux.density;em.radiodoublenullablee_total_fluxThe 1-sigma on the total flux density of the sourcemJystat.error;phot.flux.density;em.radiodoublenullablemajaxThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_majThe 1-sigma error on the FWHM of the major axis of the sourcearcsecstat.error;phys.angsizedoublenullableminaxThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_minThe 1-sigma error on the FWHM of the minor axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_majThe 1-sigma error on the FWHM of the deconvolved major axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcearcsecstat.error;phys.angsizedoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_paThe 1-sigma error on the position angle of the major axis of the sourcedegstat.error;pos.posangdoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_dc_paThe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegstat.error;pos.posangdoublenullableisl_rmsThe average background rms value of the islandmJy/beaminstr.det.noisedoublenullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.code;src.morphcharnullablemosaic_idThe name of the mosaic in which the FITS image can be foundmeta.id;obs.imagecharnullablemosaic_urlDataLink to the corresponding mosaicmeta.id;obs.imagecharnullablegaus_idID of the fitted Gaussian.meta.idintlotss_dr2.mosaics In this data release from the ongoing LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 27% of the northern sky. Our coverage is split into two regions centred at approximately 12h45m +44°30′ and 1h00m +28°00′ and spanning 4178 and 1457 square degrees respectively. The images were derived from 3,451 hrs (7.6 PB) of LOFAR High Band Antenna data which were corrected for the direction-independent instrumental properties as well as direction-dependent ionospheric distortions during extensive, but fully automated, data processing. A catalogue of 4,395,448 radio sources is derived from our total intensity (Stokes I) maps, where the majority of these have never been detected at radio wavelengths before. At 6′′ resolution, our full bandwidth Stokes I continuum maps with a central frequency of 144 MHz have: a median rms sensitivity of 83 μ Jy/beam; a flux density scale accuracy of approximately 10%; an astrometric accuracy of 0.2′′; and we estimate the point-source completeness to be 90% at a peak brightness of 0.8 mJy/beam. By creating three 16 MHz bandwidth images across the band we are able to measure the in-band spectral index of many sources, albeit the error on the derived spectral index is > ±0.2 which is a consequence of our flux-density scale accuracy and small fractional bandwidth. Our circular polarisation (Stokes V) 20′′ resolution 120-168 MHz continuum images have a median rms sensitivity of 95 μ Jy/beam, and we estimate a Stokes I to Stokes V leakage of 0.056%. Our linear polarisation (Stokes Q and Stokes U) image cubes consist of 480 97.6 kHz wide planes and have a median rms sensitivity per plane of 10.8mJy/beam at 4′ and 2.2mJy/beam at 20′′; we estimate the Stokes I to Stokes Q/U leakage to be approximately 0.2%. Here we characterise and publicly release our Stokes I, Q, U and V images in addition to the calibrated uv-data to facilitate the thorough scientific exploitation of this unique dataset.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablemosaic_idThe name of the mosaic.meta.id;meta.maincharnullablerelated_productsLink related products for the observationmeta.ref.urlcharnullablelofar_obsidsObsID(s) of the LOFAR observation(s) used for imaging the central pointing.meta.id;obsintnullabledata_pidEPIC PID of the data product (for citation).meta.bibcharnullableadler32Adler32 checksum of the filemeta.fits;meta.numbercharnullablelotss_dr3 In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution.lotss_dr3.main_sources In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoubletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJyphot.flux.density;em.radiodoublenullablee_total_fluxThe 1-sigma error on the total flux density of the sourcemJystat.error;phot.flux.density;em.radiodoublenullablepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamphot.flux.density;em.radiodoublenullablee_peak_fluxThe 1-sigma error on the peak flux density per beam of the sourcemJy/beamstat.error;phot.flux.density;em.radiodoublenullablemajaxThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_majThe 1-sigma error on the FWHM of the major axis of the sourcearcsecstat.error;phys.angsizedoublenullableminaxThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_minThe 1-sigma error on the FWHM of the minor axis of the sourcearcsecstat.error;phys.angsizedoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_paThe 1-sigma error on the position angle of the major axis of the sourcedegstat.error;pos.posangdoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_majThe 1-sigma error on the FWHM of the deconvolved major axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_dc_paThe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegstat.error;pos.posangdoublenullableisl_total_fluxThe total, integrated Stokes I flux density of the islandmJyphot.flux.density;em.radiodoublenullablee_isl_total_fluxThe 1-sigma error on the integrated Stokes I flux density of the islandmJystat.error;phot.flux.density;em.radiodoublenullableisl_rmsThe average background rms value of the islandmJy/beaminstr.det.noisedoublenullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.code;src.morphcharnullablehealpixThe name of the mosaic in which the FITS image can be foundmeta.id;obs.imagecharnullableresolutionThe angular resolution of the mosaic imagearcsecpos.angResolution;phys.angSizedoublenullablemosaic_urlDataLink to the corresponding mosaicmeta.id;obs.imagecharnullablelotss_dr3.main_gausses In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution.source_nameThe radio name of the source, automatically generated from RA and DEC in most casesmeta.id;meta.maincharraPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.ra;meta.maindoubleindexede_raEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.radoubledecPosition from PyBDSF or combination of PyBDSF componentsdegpos.eq.dec;meta.maindoubleindexede_decEstimated by PyBDSF. Only fitting uncertainties are includedarcsecstat.error;pos.eq.decdoubletotal_fluxThe total, integrated Stokes I flux density of the source at the reference frequencymJyphot.flux.density;em.radiodoublenullablee_total_fluxThe 1-sigma error on the total flux density of the sourcemJystat.error;phot.flux.density;em.radiodoublenullablepeak_fluxThe peak Stokes I flux density per beam of the sourcemJy/beamphot.flux.density;em.radiodoublenullablee_peak_fluxThe 1-sigma error on the peak flux density per beam of the sourcemJy/beamstat.error;phot.flux.density;em.radiodoublenullablemajaxThe FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_majThe 1-sigma error on the FWHM of the major axis of the sourcearcsecstat.error;phys.angsizedoublenullableminaxThe FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_minThe 1-sigma error on the FWHM of the minor axis of the sourcearcsecstat.error;phys.angsizedoublenullablepaThe position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_paThe 1-sigma error on the position angle of the major axis of the sourcedegstat.error;pos.posangdoublenullabledc_majThe FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_majThe 1-sigma error on the FWHM of the deconvolved major axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_minThe FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beamarcsecphys.angsizedoublenullablee_dc_minThe 1-sigma error on the FWHM of the deconvolved minor axis of the sourcearcsecstat.error;phys.angsizedoublenullabledc_paThe position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beamdegpos.posangdoublenullablee_dc_paThe 1-sigma error on the position angle of the deconvolved major axis of the sourcedegstat.error;pos.posangdoublenullableisl_total_fluxThe total, integrated Stokes I flux density of the islandmJyphot.flux.density;em.radiodoublenullablee_isl_total_fluxThe 1-sigma error on the integrated Stokes I flux density of the islandmJystat.error;phot.flux.density;em.radiodoublenullableisl_rmsThe average background rms value of the islandmJy/beaminstr.det.noisedoublenullables_codeA code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sourcesmeta.code;src.morphcharnullablehealpixThe name of the mosaic in which the FITS image can be foundmeta.id;obs.imagecharnullableresolutionThe angular resolution of the mosaic imagearcsecpos.angResolution;phys.angSizedoublenullablemosaic_urlDataLink to the corresponding mosaicmeta.id;obs.imagecharnullablegaus_idID of the fitted Gaussian.meta.idintwave_idWavelet scale from which the source was extractedmeta.idintxposnX image coordinate of the sourcepixpos.cartesian.xdoublee_xposnError in X image coordinate of the sourcepixstat.error;pos.cartesian.xdoubleyposnY image coordinate of the sourcepixpos.cartesian.ydoublee_yposnError in Y image coordinate of the sourcepixstat.error;pos.cartesian.ydoublewave_isl_rmsThe average background rms value of the island in the waveletJy/beaminstr.background;stat.rmsdoublewave_isl_meanThe average background mean value of the islandJy/beaminstr.background;stat.meandoublelotss_dr3.mosaics In this data release from the LOw-Frequency ARray (LOFAR) Two-metre Sky Survey (LoTSS) we present 120-168 MHz images covering 88% of the northern sky. The individual pointing images (at 6'' and 20'' resolution) were derived from 12,950 hrs (18.6 PB) of LOFAR High Band Antenna data which were processed through fully automated direction-independent and direction-dependent calibration pipelines that correct for instrumental effects as well as spatially and temporally varying ionospheric distortions. The Stokes I images were then combined, accounting for the rms noise level and telescope beam, to form the final Stokes I mosaic images at 6'' and 20'' resolution, with a central frequency of 144MHz. From the 6'' resolution Stokes mosaics we derived a catalogue of 13,664,379 radio sources (consisting of 16,943,656 Gaussian components), the majority of which have never been detected at radio wavelengths before. These mosaics have a median rms sensitivity of 92 μJy/beam; a random and systematic flux density scale accuracy of approximately 6% and 2%, respectively; an astrometric accuracy of 0.24''; and we estimate that we detect more than 95% of sources with integrated flux densities exceeding nine times the local root mean square noise. To enable thorough scientific exploitation of this unique dataset, we have published two sub-collections. The first contains all the Stokes I mosaic products described above. The second contains the individual pointing products, including calibrated uv data (measurement sets and direction-dependent calibration solutions) to allow for re-imaging or post-processing; Stokes I images at 6' ' and 20'' resolution (with associated scaling factors required to reproduce the mosaic images); Stokes V images at 6'' resolution for each observing epoch; and Stokes Q and U image cubes at 20'' and 4' resolution.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablemosaic_idThe name of the mosaic.meta.id;meta.maincharnullablerelated_productsLink related products for the observationmeta.ref.urlcharnullablelofar_obsidsObsID(s) of the LOFAR observation(s) used for imaging the central pointing.meta.id;obsintnullablerecord_idSurf Data Repository record ID.meta.bibcharnullablemd5md5 checksum of the filemeta.fits;meta.numbercharnullabledatefirstobsEpoch of first observationdtime.epoch;time.startdoublenullabledatelastobsEpoch of last observationdtime.epoch;time.enddoublenullabledateallobsEpoch of all observationstime.epochdoublenullablemsss This service queries the archive of both LBA and HBA images from the Multifrequency Snapshot Sky Survey (MSSS). This survey is the first major observing program to be carried out with LOFAR during its ongoing commissioning phase.msss.img_main This service queries the archive of both LBA and HBA images from the Multifrequency Snapshot Sky Survey (MSSS). This survey is the first major observing program to be carried out with LOFAR during its ongoing commissioning phase.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullableobsfreqcharnullablemvf This service queries the catalogue of both LBA and HBA images from the Multifrequency Snapshot Sky Survey (MSSS). This survey is the first major observing program to be carried out with LOFAR during its ongoing commissioning phase. The Verification Field is a region of 100 square degrees centered at (15h,69◦).mvf.main This service queries the unified source catalogue of radio sources from the Multifrequency Snapshot Sky Survey (MSSS) Verification Field. This survey is the first major observing program to be carried out with LOFAR during its ongoing commissioning phase. This service queries the unified source catalogue database for the MSSS survey. The Verification Field is a region of 100 square degrees centered at (15h,69◦).idSource ID, formed as Jhhmmss+ddmmss using the IAU convention.meta.id;meta.maincharindexedprimaryraSource J2000 Right Ascension, in decimal degrees.degpos.eq.ra;meta.maindoubleindexeddecSource J2000 Declination, in decimal degrees.degpos.eq.dec;meta.maindoubleindexede_raError on source J2000 Right Ascension, in seconds of time.sstat.error;pos.eq.radoublee_decError on source J2000 Declination, in arcseconds.arcsecstat.error;pos.eq.decdoublee_ra_sysFull error in source J2000 Right Ascension, in seconds of time. Includes both the formal error in the source position fit and a systematic positional error termsstat.error;pos.eq.radoublee_dec_sysFull error in source J2000 Declination, in seconds of time. Includes both the formal error in the source position fit and a systematic positional error termarcsecstat.error;pos.eq.decdoublemos_idMosaic name from which the source was extracted.charcal_id_lbaPrimary flux calibrator(s) used to set the LBA flux density scale in the vicinity of the source.charnullablecal_id_hbaPrimary flux calibrator(s) used to set the HBA flux density scale in the vicinity of the source.charnullablenunresNumber of bands in which source is unresolved.shortndetNumber of bands in which source was detected.shortnunres_lbaNumber of LBA bands in which the source is unresolved.shortndet_lbaNumber of LBA bands in which source was detected.shortnunres_hbaNumber of HBA bands in which the source is unresolved.shortndet_hbaNumber of HBA bands in which source was detected.shorta0Spectral flux at 150 MHzdoublenullablea1Spectral indexdoublenullablee_a0Error on spectral flux at 150 MHzdoublenullablee_a1Error on spectral indexdoublenullablea0_lbaSpectral flux density at 50 MHzdoublenullablea1_lbaSpectral indexdoublenullablee_a0_lbaError in spectral flux density at 50 MHzdoublenullablee_a1_lbaError in spectral indexdoublenullablea0_hbaSpectral flux density at 150 MHzdoublenullablea1_hbaSpectral indexdoublenullablee_a0_hbaError in spectral flux density at 150 MHzdoublenullablee_a1_hbaError in spectral indexdoublenullablesint031Source integrated flux @ 031 MHz, in Jydoublenullablee_sint031Error on source integrated flux @ 031 MHz, in Jydoublenullablespk031Source peak flux @ 031 MHz, in Jydoublenullablee_spk031Error on source peak flux @ 031 MHz, in Jydoublenullablemajax031Major axis of fitted ellipse @ 031 MHzdoublenullablee_majax031Error on major axisdoublenullableminax031Minor axis of fitted ellipse @ 031 MHzdoublenullablee_minax031Error on minor axisdoublenullablepa031Position angle of fitted ellipse @ 031 MHz, in degreesdoublenullablee_pa031Error on position angledoublenullablesfflag031Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint037Source integrated flux @ 037 MHz, in Jydoublenullablee_sint037Error on source integrated flux @ 037 MHz, in Jydoublenullablespk037Source peak flux @ 037 MHz, in Jydoublenullablee_spk037Error on source peak flux @ 037 MHz, in Jydoublenullablemajax037Major axis of fitted ellipse @ 037 MHzdoublenullablee_majax037Error on major axisdoublenullableminax037Minor axis of fitted ellipse @ 037 MHzdoublenullablee_minax037Error on minor axisdoublenullablepa037Position angle of fitted ellipse @ 037 MHz, in degreesdoublenullablee_pa037Error on position angledoublenullablesfflag037Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint043Source integrated flux @ 043 MHz, in Jydoublenullablee_sint043Error on source integrated flux @ 043 MHz, in Jydoublenullablespk043Source peak flux @ 043 MHz, in Jydoublenullablee_spk043Error on source peak flux @ 043 MHz, in Jydoublenullablemajax043Major axis of fitted ellipse @ 043 MHzdoublenullablee_majax043Error on major axisdoublenullableminax043Minor axis of fitted ellipse @ 043 MHzdoublenullablee_minax043Error on minor axisdoublenullablepa043Position angle of fitted ellipse @ 043 MHz, in degreesdoublenullablee_pa043Error on position angledoublenullablesfflag043Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint049Source integrated flux @ 049 MHz, in Jydoublenullablee_sint049Error on source integrated flux @ 049 MHz, in Jydoublenullablespk049Source peak flux @ 049 MHz, in Jydoublenullablee_spk049Error on source peak flux @ 049 MHz, in Jydoublenullablemajax049Major axis of fitted ellipse @ 049 MHzdoublenullablee_majax049Error on major axisdoublenullableminax049Minor axis of fitted ellipse @ 049 MHzdoublenullablee_minax049Error on minor axisdoublenullablepa049Position angle of fitted ellipse @ 049 MHz, in degreesdoublenullablee_pa049Error on position angledoublenullablesfflag049Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint054Source integrated flux @ 054 MHz, in Jydoublenullablee_sint054Error on source integrated flux @ 054 MHz, in Jydoublenullablespk054Source peak flux @ 054 MHz, in Jydoublenullablee_spk054Error on source peak flux @ 054 MHz, in Jydoublenullablemajax054Major axis of fitted ellipse @ 054 MHzdoublenullablee_majax054Error on major axisdoublenullableminax054Minor axis of fitted ellipse @ 054 MHzdoublenullablee_minax054Error on minor axisdoublenullablepa054Position angle of fitted ellipse @ 054 MHz, in degreesdoublenullablee_pa054Error on position angledoublenullablesfflag054Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint060Source integrated flux @ 060 MHz, in Jydoublenullablee_sint060Error on source integrated flux @ 060 MHz, in Jydoublenullablespk060Source peak flux @ 060 MHz, in Jydoublenullablee_spk060Error on source peak flux @ 060 MHz, in Jydoublenullablemajax060Major axis of fitted ellipse @ 060 MHzdoublenullablee_majax060Error on major axisdoublenullableminax060Minor axis of fitted ellipse @ 060 MHzdoublenullablee_minax060Error on minor axisdoublenullablepa060Position angle of fitted ellipse @ 060 MHz, in degreesdoublenullablee_pa060Error on position angledoublenullablesfflag060Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint066Source integrated flux @ 066 MHz, in Jydoublenullablee_sint066Error on source integrated flux @ 066 MHz, in Jydoublenullablespk066Source peak flux @ 066 MHz, in Jydoublenullablee_spk066Error on source peak flux @ 066 MHz, in Jydoublenullablemajax066Major axis of fitted ellipse @ 066 MHzdoublenullablee_majax066Error on major axisdoublenullableminax066Minor axis of fitted ellipse @ 066 MHzdoublenullablee_minax066Error on minor axisdoublenullablepa066Position angle of fitted ellipse @ 066 MHz, in degreesdoublenullablee_pa066Error on position angledoublenullablesfflag066Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint074Source integrated flux @ 074 MHz, in Jydoublenullablee_sint074Error on source integrated flux @ 074 MHz, in Jydoublenullablespk074Source peak flux @ 074 MHz, in Jydoublenullablee_spk074Error on source peak flux @ 074 MHz, in Jydoublenullablemajax074Major axis of fitted ellipse @ 074 MHzdoublenullablee_majax074Error on major axisdoublenullableminax074Minor axis of fitted ellipse @ 074 MHzdoublenullablee_minax074Error on minor axisdoublenullablepa074Position angle of fitted ellipse @ 074 MHz, in degreesdoublenullablee_pa074Error on position angledoublenullablesfflag074Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint120Source integrated flux @ 120 MHz, in Jydoublenullablee_sint120Error on source integrated flux @ 120 MHz, in Jydoublenullablespk120Source peak flux @ 120 MHz, in Jydoublenullablee_spk120Error on source peak flux @ 120 MHz, in Jydoublenullablemajax120Major axis of fitted ellipse @ 120 MHzdoublenullablee_majax120Error on major axisdoublenullableminax120Minor axis of fitted ellipse @ 120 MHzdoublenullablee_minax120Error on minor axisdoublenullablepa120Position angle of fitted ellipse @ 120 MHz, in degreesdoublenullablee_pa120Error on position angledoublenullablesfflag120Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint125Source integrated flux @ 125 MHz, in Jydoublenullablee_sint125Error on source integrated flux @ 125 MHz, in Jydoublenullablespk125Source peak flux @ 125 MHz, in Jydoublenullablee_spk125Error on source peak flux @ 125 MHz, in Jydoublenullablemajax125Major axis of fitted ellipse @ 125 MHzdoublenullablee_majax125Error on major axisdoublenullableminax125Minor axis of fitted ellipse @ 125 MHzdoublenullablee_minax125Error on minor axisdoublenullablepa125Position angle of fitted ellipse @ 125 MHz, in degreesdoublenullablee_pa125Error on position angledoublenullablesfflag125Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint129Source integrated flux @ 129 MHz, in Jydoublenullablee_sint129Error on source integrated flux @ 129 MHz, in Jydoublenullablespk129Source peak flux @ 129 MHz, in Jydoublenullablee_spk129Error on source peak flux @ 129 MHz, in Jydoublenullablemajax129Major axis of fitted ellipse @ 129 MHzdoublenullablee_majax129Error on major axisdoublenullableminax129Minor axis of fitted ellipse @ 129 MHzdoublenullablee_minax129Error on minor axisdoublenullablepa129Position angle of fitted ellipse @ 129 MHz, in degreesdoublenullablee_pa129Error on position angledoublenullablesfflag129Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint135Source integrated flux @ 135 MHz, in Jydoublenullablee_sint135Error on source integrated flux @ 135 MHz, in Jydoublenullablespk135Source peak flux @ 135 MHz, in Jydoublenullablee_spk135Error on source peak flux @ 135 MHz, in Jydoublenullablemajax135Major axis of fitted ellipse @ 135 MHzdoublenullablee_majax135Error on major axisdoublenullableminax135Minor axis of fitted ellipse @ 135 MHzdoublenullablee_minax135Error on minor axisdoublenullablepa135Position angle of fitted ellipse @ 135 MHz, in degreesdoublenullablee_pa135Error on position angledoublenullablesfflag135Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint143Source integrated flux @ 143 MHz, in Jydoublenullablee_sint143Error on source integrated flux @ 143 MHz, in Jydoublenullablespk143Source peak flux @ 143 MHz, in Jydoublenullablee_spk143Error on source peak flux @ 143 MHz, in Jydoublenullablemajax143Major axis of fitted ellipse @ 143 MHzdoublenullablee_majax143Error on major axisdoublenullableminax143Minor axis of fitted ellipse @ 143 MHzdoublenullablee_minax143Error on minor axisdoublenullablepa143Position angle of fitted ellipse @ 143 MHz, in degreesdoublenullablee_pa143Error on position angledoublenullablesfflag143Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint147Source integrated flux @ 147 MHz, in Jydoublenullablee_sint147Error on source integrated flux @ 147 MHz, in Jydoublenullablespk147Source peak flux @ 147 MHz, in Jydoublenullablee_spk147Error on source peak flux @ 147 MHz, in Jydoublenullablemajax147Major axis of fitted ellipse @ 147 MHzdoublenullablee_majax147Error on major axisdoublenullableminax147Minor axis of fitted ellipse @ 147 MHzdoublenullablee_minax147Error on minor axisdoublenullablepa147Position angle of fitted ellipse @ 147 MHz, in degreesdoublenullablee_pa147Error on position angledoublenullablesfflag147Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint151Source integrated flux @ 151 MHz, in Jydoublenullablee_sint151Error on source integrated flux @ 151 MHz, in Jydoublenullablespk151Source peak flux @ 151 MHz, in Jydoublenullablee_spk151Error on source peak flux @ 151 MHz, in Jydoublenullablemajax151Major axis of fitted ellipse @ 151 MHzdoublenullablee_majax151Error on major axisdoublenullableminax151Minor axis of fitted ellipse @ 151 MHzdoublenullablee_minax151Error on minor axisdoublenullablepa151Position angle of fitted ellipse @ 151 MHz, in degreesdoublenullablee_pa151Error on position angledoublenullablesfflag151Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortsint157Source integrated flux @ 157 MHz, in Jydoublenullablee_sint157Error on source integrated flux @ 157 MHz, in Jydoublenullablespk157Source peak flux @ 157 MHz, in Jydoublenullablee_spk157Error on source peak flux @ 157 MHz, in Jydoublenullablemajax157Major axis of fitted ellipse @ 157 MHzdoublenullablee_majax157Error on major axisdoublenullableminax157Minor axis of fitted ellipse @ 157 MHzdoublenullablee_minax157Error on minor axisdoublenullablepa157Position angle of fitted ellipse @ 157 MHz, in degreesdoublenullablee_pa157Error on position angledoublenullablesfflag157Flag indicating that the source was only iden- tified in one of the two source finders. (0 means it was detected in both; 1 means it was detected only in PyBDSM; 2 means only in PYSE.)shortmvf.msssvf_img_main This service queries the catalogue of both LBA and HBA images from the Multifrequency Snapshot Sky Survey (MSSS). This survey is the first major observing program to be carried out with LOFAR during its ongoing commissioning phase. The Verification Field is a region of 100 square degrees centered at (15h,69◦).accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullableobsfreqcharnullablesauron This service queries the catalogue of radio sources from the SAURON WSRT HI Survey. This project consists of deep Westerbork Synthesis Radio Telescope observations of neutral hydrogen in 12 nearby elliptical and lenticular galaxies. The selected objects come from a representative sample of nearby galaxies earlier studied at optical wavelengths with the integral-field spectrograph SAURON (Spectrographic Areal Unit for Research on Optical Nebulae). They are field galaxies, or (in two cases) located in poor group environments.sauron.main This service queries the catalogue of radio sources from the SAURON WSRT HI Survey. This project consists of deep Westerbork Synthesis Radio Telescope observations of neutral hydrogen in 12 nearby elliptical and lenticular galaxies. The selected objects come from a representative sample of nearby galaxies earlier studied at optical wavelengths with the integral-field spectrograph SAURON (Spectrographic Areal Unit for Research on Optical Nebulae). They are field galaxies, or (in two cases) located in poor group environments.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablesauron.mom0 This service queries the catalogue of radio sources from the SAURON WSRT HI Survey. This project consists of deep Westerbork Synthesis Radio Telescope observations of neutral hydrogen in 12 nearby elliptical and lenticular galaxies. The selected objects come from a representative sample of nearby galaxies earlier studied at optical wavelengths with the integral-field spectrograph SAURON (Spectrographic Areal Unit for Research on Optical Nebulae). They are field galaxies, or (in two cases) located in poor group environments.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablesvc This is a source catalog of the Apertif Science Verification Campaign containing polarised sources in the L-Band in combination with infrared and optical data.svc.main This is a source catalog of the Apertif Science Verification Campaign containing polarised sources in the L-Band in combination with infrared and optical data.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullableindexSource indexmeta.id;meta.mainintindexedprimaryidSource identifier concatenated from a prefix and the right ascension and declination of the central position of the source in degreesmeta.idcharnullableraRight Ascension of the central position of the source in degrees.degpos.eq.ra;meta.maindoubleindexednullablera_errUncertainty of the right Ascension of the central position of the source in degrees.degstat.error;pos.eq.ra;meta.maindoublenullabledecDeclination of the central position of the source in degrees.degpos.eq.dec;meta.maindoubleindexednullabledec_errUncertainty of the declination of the central position of the source in degrees.degstat.error;pos.eq.dec;meta.maindoublenullableipiIntegrated polarised intensity of the source in units of Jy.Jyphys.polarization;meta.maindoublenullableipi_errUncertainty of the integrated polarised intensity of the source in units of Jy.Jystat.error;phys.polarization;meta.maindoublenullables_codeS for unresolved sources, E for resolved sourcesmeta.codecharnullablera_compRight ascension of the position of the source component in degrees.degpos.eq.radoublenullablera_comp_errUncertainty of the right ascension of the position of the source component in degrees.degstat.error;pos.eq.radoublenullabledec_compDeclination of the position of the source component in degrees.degpos.eq.decdoublenullabledec_comp_errUncertainty of the declination of the position of the source component in degrees.degstat.error;pos.eq.radoublenullablepi_compPolarised emission of the source component in units of JyJyphys.polarizationdoublenullablepi_comp_errUncertainty of the polarised emission of the source component in units of JyJystat.error;phys.polarizationdoublenullablepi_comp_peakPeak polarised emission of the source component in units of Jy.Jyphys.polarization;stat.maxdoublenullablepi_comp_peak_errUncertainty of the peak polarised emission of the source component in units of Jy.Jystat.error;phys.polarization;stat.maxdoublenullablepi_rmsStandard deviation at the peak position of the source component in units of Jy/beam.Jy/beamstat.stdev;phys.polarizationdoublenullablerm_compRotation measure at the peak position of the source component in units of rad/m**2.rad/m**2phys.polarization.rotmeasuredoublenullablerm_comp_errUncertainty of the rotation measure at the peak position of the source component in units of rad/m**2.rad/m**2stat.error;phys.polarization.rotmeasuredoublenullabletp_idTotal power source identifier. For internal usage only. Was used for cross-matching.metacharnullabletpRadio continuum flux of the cross-matched total power counterpart in units of Jy.Jyphot.flux.density;em.radio;spect.continuumdoublenullabletp_errUncertainty of the radio continuum flux of the cross-matched total power counterpart in units of Jy.Jystat.error;phot.flux.density;em.radio;spect.continuumdoublenullablera_tpRight ascension of the central position of the total power counterpart in units of degrees.degpos.eq.radoublenullablera_tp_errUncertainty of the right ascension of the central position of the total power counterpart in units of degrees.degstat.error;pos.eq.radoublenullabledec_tpDeclination of the central position of the total power counterpart in units of degrees.degpos.eq.decdoublenullabledec_tp_errUncertainty of the declination of the central position of the total power counterpart in units of degrees.degstat.error;pos.eq.decdoublenullablefpFractional polarisation of the source derived from the integrated polarised and total power fluxes.phys.polarizationdoublenullablefp_errUncertainty of the fractional polarisation of the source derived from the integrated polarised and total power fluxes.stat.error;phys.polarizationdoublenullablenvss_iTotal power flux of a possible NVSS counterpart in units of Jy.Jyphot.flux.densitydoublenullablenvss_i_errUncertainty of the total power flux of a possible NVSS counterpart in units of Jy.Jystat.error;phot.flux.densitydoublenullablenvss_piPolarised intensity flux of a possible NVSS counterpart in units of Jy.Jyphot.flux.densitydoublenullablenvss_pi_errUncertainty of the polarised intensity flux of a possible NVSS counterpart in units of Jy.Jystat.error;phot.flux.densitydoublenullablenvss_fpFractional polarisation of a possible NVSS counterpart.phys.polarizationdoublenullablenvss_fp_errUncertainty of the fractional polarisation of a possible NVSS counterpart.stat.error;phys.polarizationdoublenullablenvss_rmRotation measure of a possible NVSS counterpart in units of rad/m**2.rad/m**2phys.polarization.rotMeasuredoublenullablenvss_rm_errUncertainty of the rotation measure of a possible NVSS counterpart in units of rad/m**2.rad/m**2stat.error;phys.polarization.rotMeasuredoublenullablenvss_raRight ascension of a possible NVSS counterpart in units of degrees.degpos.eq.radoublenullablenvss_ra_errUncertainty of the right ascension of a possible NVSS counterpart in units of degrees.degstat.error;pos.eq.radoublenullablenvss_decDeclination of a possible NVSS counterpart in units of degrees.degpos.eq.decdoublenullablenvss_dec_errUncertainty of the declination of a possible NVSS counterpart in units of degrees.degstat.error;pos.eq.decdoublenullablewise_idAllWISE ID of a possible counterpart.meta.idcharnullablewise_raRight ascension of a possible AllWISE counterpart in units of degrees.degpos.eq.radoublenullablewise_ra_errUncertainty of the right ascension of a possible AllWISE counterpart in units of degrees.degstat.error;pos.eq.radoublenullablewise_decDeclination of a possible AllWISE counterpart in units of degrees.degpos.eq.decdoublenullablewise_dec_errUncertainty of the declination of a possible AllWISE counterpart in units of degrees.degstat.error;pos.eq.decdoublenullablewise_flux_3_4Brightness of a possible AllWISE counterpart in units of mag at 3.4μm.magphot.mag;em.IR.3-4umdoublenullablewise_flux_3_4_errUncertainty of the brightness of a possible AllWISE counterpart in units of mag at 3.4μm.magstat.error;phot.mag;em.IR.3-4umdoublenullablewise_snr_3_4Signal-to-noise ratio of a possible AllWISE counterpart in units of mag at 3.4μm.magstat.snr;phot.mag;em.IR.3-4umdoublenullablewise_flux_4_6Brightness of a possible AllWISE counterpart in units of mag at 4.6μm.magphot.mag;em.IR.4-8umdoublenullablewise_flux_4_6_errUncertainty of the brightness of a possible AllWISE counterpart in units of mag at 4.6μm.magstat.error;phot.mag;em.IR.4-8umdoublenullablewise_snr_4_6Signal-to-noise ratio of a possible AllWISE counterpart in units of mag at 4.6μm.magstat.snr;phot.mag;em.IR.4-8umdoublenullablewise_flux_12Brightness of a possible AllWISE counterpart in units of mag at 12μm.magphot.mag;em.IR.8-15umdoublenullablewise_flux_12_errUncertainty of the brightness of a possible AllWISE counterpart in units of mag at 12μm.magstat.error;phot.mag;em.IR.8-15umdoublenullablewise_snr_12Signal-to-noise ratio of a possible AllWISE counterpart in units of mag at 12μm.magstat.snr;phot.mag;em.IR.8-15umdoublenullablewise_flux_22Brightness of a possible AllWISE counterpart in units of mag at 22μm.magphot.mag;em.IR.15-30umdoublenullablewise_flux_22_errUncertainty of the brightness of a possible AllWISE counterpart in units of mag at 22μm.magstat.error;phot.mag;em.IR.15-30umdoublenullablewise_snr_22Signal-to-noise ratio of a possible AllWISE counterpart in units of mag at 22μm.magstat.snr;phot.mag;em.IR.15-30umdoublenullablesdss_idSDSS DR16 ID of a possible counterpart.meta.idcharnullablesdss_raRight ascension of a possible SDSS DR16 counterpart in units of degrees.degpos.eq.radoublenullablesdss_decDeclination of a possible SDSS DR16 counterpart in units of degrees.degpos.eq.decdoublenullablesdss_flux_uBrightness of a possible SDSS DR16 counterpart in units of mag in the U filter.magphot.mag;em.opt.Udoublenullablesdss_flux_u_errUncertainty of the brightness of a possible SDSS DR16 counterpart in units of mag in the U filter.magstat.error;phot.mag;em.opt.Udoublenullablesdss_flux_gBrightness of a possible SDSS DR16 counterpart in units of mag in the G filter.magphot.mag;em.opt.Bdoublenullablesdss_flux_g_errUncertainty of the brightness of a possible SDSS DR16 counterpart in units of mag in the G filter.magstat.error;phot.mag;em.opt.Bdoublenullablesdss_flux_rBrightness of a possible SDSS DR16 counterpart in units of mag in the R filter.magphot.mag;em.opt.Rdoublenullablesdss_flux_r_errUncertainty of the brightness of a possible SDSS DR16 counterpart in units of mag in the R filter.magstat.error;phot.mag;em.opt.Rdoublenullablesdss_flux_iBrightness of a possible SDSS DR16 counterpart in units of mag in the I filter.magphot.mag;em.opt.Rdoublenullablesdss_flux_i_errUncertainty of the brightness of a possible SDSS DR16 counterpart in units of mag in the I filter.magstat.error;phot.mag;em.opt.Rdoublenullablesdss_flux_zBrightness of a possible SDSS DR16 counterpart in units of mag in the Z filter.magphot.mag;em.opt.Idoublenullablesdss_flux_z_errUncertainty of the brightness of a possible SDSS DR16 counterpart in units of mag in the Z filter.magstat.error;phot.mag;em.opt.Idoublenullablesdss_zPhotometric or if available sprectroscopic redshift of a possible SDSS DR16 counterpart.src.redshift.photdoublenullablesdss_z_errUncertainty of the photometric or if available sprectroscopic redshift of a possible SDSS DR16 counterpart.stat.error;src.redshift.photdoublenullabletap_schema The VO @ ASTRON's Table Access Protocol (TAP) service with table metadata.tap_schema.schemasSchemas containing tables available for ADQL querying.schema_nameFully qualified schema namecharindexedprimarydescriptionBrief description of the schemacharnullableutypeutype if schema corresponds to a data modelcharnullableschema_indexSuggested position this schema should take in a sorted list of schemas from this data center.intnullabletap_schema.tablesTables available for ADQL querying.schema_nameFully qualified schema namecharnullabletable_nameFully qualified table namecharindexedprimarytable_typeOne of: table, viewcharnullabledescriptionBrief description of the tablecharnullableutypeutype if the table corresponds to a data modelcharnullabletable_indexSuggested position this table should take in a sorted list of tables from this data centerintnullablesourcerdId of the originating rd (local information)charnullabletap_schema.schemasschema_nameschema_nametap_schema.columnsColumns in tables available for ADQL querying.table_nameFully qualified table namecharindexedprimarycolumn_nameColumn namecharindexedprimarydescriptionBrief description of columnunicodeCharnullableunitUnit in VO standard formatcharnullableucdUCD of column if anycharnullableutypeUtype of column if anycharnullabledatatypeADQL datatypecharnullablearraysizeArraysize in VOTable notationcharnullablextypeVOTable extended type information (for special interpretation of data content, e.g., timestamps or points)charnullable"size"Legacy length (ignore if you can).intnullableprincipalIs column principal?intindexedIs there an index on this column?intstdIs this a standard column?intsourcerdId of the originating rd (local information)charnullablecolumn_index1-based index of the column in database order.shortnullabletap_schema.tablestable_nametable_nametap_schema.keysForeign key relationships between tables available for ADQL querying.key_idUnique key identifiercharindexedprimaryfrom_tableFully qualified table namecharnullabletarget_tableFully qualified table namecharnullabledescriptionDescription of this keycharnullableutypeUtype of this keycharnullablesourcerdId of the originating rd (local information)charnullabletap_schema.tablesfrom_tabletable_nametap_schema.tablestarget_tabletable_nametap_schema.key_columnsColumns participating in foreign key relationships between tables available for ADQL querying.key_idKey identifier from TAP_SCHEMA.keyscharnullablefrom_columnKey column name in the from tablecharnullabletarget_columnKey column in the target tablecharnullablesourcerdId of the originating rd (local information)charnullabletap_schema.keyskey_idkey_idtap_schema.groupsColumns that are part of groups within tables available for ADQL querying.table_nameFully qualified table namecharnullablecolumn_nameName of a column belonging to the groupcharnullablecolumn_utypeutype the column withing the groupcharnullablegroup_nameName of the groupcharnullablegroup_utypeutype of the groupcharnullablesourcerdId of the originating rd (local information)charnullabletap_schema.tablestable_nametable_nametgssadr This service queries the catalogue of radio sources from the images of the TIFR GMRT Sky Survey (TGSS) Alternative Data Release (up to 1 deg square). This data release contains previously unpublished data from the TIFR GMRT Sky Survey (TGSS), which has been independently reprocessed. It includes continuum stokes I images of 99.5 percent of the radio sky north of -53° DEC (3.6π sr, or 90 percent of the full sky) at a resolution of 25“ x 25” north of 19° DEC and 25“ x 25” / cos(DEC-19°) south of 19°, and a median noise of 3.5 mJy/beam. The extracted radio source catalog contains positions, flux densities, sizes and more for 0.62 Million sources down to a 7-sigma peak-to-noise threshold.tgssadr.img_main This service queries the catalogue of images (5 def square mosaics) from the images of the TIFR GMRT Sky Survey (TGSS) Alternative Data Release (up to 1 deg square). This data release contains previously unpublished data from the TIFR GMRT Sky Survey (TGSS), which has been independently reprocessed. It includes continuum stokes I images of 99.5 percent of the radio sky north of -53° DEC (3.6π sr, or 90 percent of the full sky) at a resolution of 25“ x 25” north of 19° DEC and 25“ x 25” / cos(DEC-19°) south of 19°, and a median noise of 3.5 mJy/beam. The extracted radio source catalog contains positions, flux densities, sizes and more for 0.62 Million sources down to a 7-sigma peak-to-noise threshold.accrefAccess key for the dataAccess.ReferencecharindexednullableownerOwner of the datacharnullableembargoDate the data will become/became publicacharnullablemimeMIME type of the file servedmeta.code.mimeAccess.FormatcharnullableaccsizeSize of the data in bytesbyteVOX:Image_FileSizeAccess.SizelongnullablecenteralphaApproximate center of image, RAdegPOS_EQ_RA_MAINdoublenullablecenterdeltaApproximate center of image, DecdegPOS_EQ_DEC_MAINdoublenullableimagetitleSynthetic name of the imageVOX:Image_TitlecharnullableinstidIdentifier of the originating instrumentINST_IDcharnullabledateobsEpoch at midpoint of observationdVOX:Image_MJDateObsdoublenullablenaxesNumber of axes in dataVOX:Image_NaxesintnullablepixelsizeNumber of pixels along each of the axespixVOX:Image_NaxisintnullablepixelscaleThe pixel scale on each image axisdeg/pixVOX:Image_ScalefloatnullablerefframeCoordinate system reference frameVOX:STC_CoordRefFramecharnullablewcs_equinoxEquinox of the given coordinatesyrVOX:STC_CoordEquinoxfloatnullablewcs_projectionFITS WCS projection typeVOX:WCS_CoordProjectioncharnullablewcs_refpixelWCS reference pixelpixVOX:WCS_CoordRefPixelfloatnullablewcs_refvaluesWorld coordinates at WCS reference pixeldegVOX:WCS_CoordRefValuedoublenullablewcs_cdmatrixFITS WCS CDij matrixdeg/pixVOX:WCS_CDMatrixfloatnullablebandpassidFreeform name of the bandpass usedVOX:BandPass_IDcharnullablebandpassunitUnit of bandpass specifications (always m).VOX:BandPass_UnitcharnullablebandpassrefvalCharacteristic quantity for the bandpass of the imagemVOX:BandPass_RefValuefloatnullablebandpasshiUpper limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_HiLimitfloatnullablebandpassloLower limit of the bandpass (in BandPass_Unit units)mVOX:BandPass_LoLimitfloatnullablepixflagsFlags specifying the processing done (C-original; F-resampled; Z-fluxes valid; X-not resampled; V-for display onlyVOX:Image_PixFlagscharnullablecoverageField covered by the imagedegdoubleindexednullablebmajBeam Major Axis, in arcsecarcsecfloatnullablebminBeam Minor Axis, in arcsecarcsecfloatnullablebpaBeam Position Angle, in degdegfloatnullabletgssadr.main This service queries the catalogue of radio sources from the images of the TIFR GMRT Sky Survey (TGSS) Alternative Data Release (up to 1 deg square). This data release contains previously unpublished data from the TIFR GMRT Sky Survey (TGSS), which has been independently reprocessed. It includes continuum stokes I images of 99.5 percent of the radio sky north of -53° DEC (3.6π sr, or 90 percent of the full sky) at a resolution of 25“ x 25” north of 19° DEC and 25“ x 25” / cos(DEC-19°) south of 19°, and a median noise of 3.5 mJy/beam. The extracted radio source catalog contains positions, flux densities, sizes and more for 0.62 Million sources down to a 7-sigma peak-to-noise threshold.idSource IDmeta.id;meta.maincharindexedprimaryraSource J2000 Right Ascension, in decimal degrees.degpos.eq.ra;meta.maindoubleindexede_raError on source J2000 Right Ascension, in arcsecondsarcsecstat.error;pos.eq.radoubledecSource J2000 Declination, in decimal degrees.degpos.eq.dec;meta.maindoubleindexede_decError on source J2000 Declination, in arcsecondsarcsecstat.error;pos.eq.decdoublesintSource integrated flux, in mJymJydoublenullablee_sintError on source integrated flux, in mJymJydoublenullablespkSource peak flux, in mJy/beammJy/beamdoublenullablee_spkError on source peak flux, in mJy/beammJy/beamdoublenullablemajaxMajor axis of fitted ellipsearcsecdoublenullablee_majaxError on major axisarcsecdoublenullableminaxMinor axis of fitted ellipsearcsecdoublenullablee_minaxError on minor axisarcsecdoublenullablepaPosition angle of fitted ellipse, in degreesdegdoublenullablee_paError on position angledegdoublenullableisland_rmsThe local RMS noise computed in a 40 pixel square around centered on the source, in mJy/beam.mJy/beamdoublenullables_codeA code that defines the multiplicity of the source structure in terms of Gaussian (Gaus) components:'S' refers to a single-Gaussian source, 'C' refers to a single-Gaussian source nearby other sources, and 'M' is a source fit by multiple Gaussians.charnullablemosaic_nameThe name of the image mosaic from which the the source entry was extracted.charnullable