Table information for 'hetdex.main'

General

This table is not available for ADQL queries and through the TAP endpoint.

Resource Description: 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.

For a list of all services and tables belonging to this table's resource, see Information on resource 'LoTSS-DR1 Raw Radio Catalogue'

Further information

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:hetdex_main,
  year=2018,
  title={{LoTSS}-DR1 Raw Radio Catalogue},
  author={{LOFAR} Surveys {KSP}},
  url={https://vo.astron.nl/tableinfo/hetdex.main},
  howpublished={{VO} resource provided by the The VO @ {ASTRON}}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
Source_Name ID The radio name of the source, automatically generated from RA and DEC in most cases N/A meta.id;meta.main
RA RA Position from PyBDSF or combination of PyBDSF components deg pos.eq.ra;meta.main
E_RA error RA Estimated by PyBDSF. Only fitting uncertainties are included arcsec stat.error;pos.eq.ra
DEC Dec Position from PyBDSF or combination of PyBDSF components deg pos.eq.dec;meta.main
E_DEC error Dec Estimated by PyBDSF. Only fitting uncertainties are included arcsec stat.error;pos.eq.dec
Peak_flux Peak flux The peak Stokes I flux density per beam of the source mJy/beam N/A
E_Peak_flux error Peak flux The 1-σ error on the peak flux density per beam of the source mJy/beam N/A
Total_flux Total flux The total, integrated Stokes I flux density of the source at the reference frequency mJy N/A
E_Total_flux error Total flux The 1-σ error on the total flux density of the source mJy N/A
Maj Major Axis The FWHM of the major axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beam arcsec N/A
E_Maj E_Maj The 1-σ error on the FWHM of the major axis of the source arcsec N/A
Minor Minor Axis The FWHM of the minor axis of the source, INCLUDING convolution with the 6-arcsec LOFAR beam arcsec N/A
E_Min E_Min The 1-σ error on the FWHM of the minor axis of the source arcsec N/A
DC_Maj DC_Maj The FWHM of the major axis of the source, after de-convolution with the 6-arcsec LOFAR beam arcsec N/A
E_DC_Maj E_DC_Maj The 1-σ error on the FWHM of the deconvolved major axis of the source arcsec N/A
DC_Min DC_Min The FWHM of the minor axis of the source, after de-convolution with the 6-arcsec LOFAR beam arcsec N/A
E_DC_Min E_DC_Min The 1-σ error on the FWHM of the deconvolved minor axis of the source arcsec N/A
PA PA The position angle of the major axis of the source measured east of north, INCLUDING convolution with the 6-arcsec LOFAR beam deg N/A
E_PA E_PA The 1-σ error on the position angle of the major axis of the source deg N/A
DC_PA DC_PA The position angle of the major axis of the source measured east of north, after de-convolution with the 6-arcsec LOFAR beam deg N/A
E_DC_PA E_DC_PA The 1-σ error on the position angle of the deconvolved major axis of the source arcsec N/A
Isl_rms RMS noise The average background rms value of the island mJy/beam N/A
S_Code Gaus A 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. N/A N/A
Mosaic_ID Mosaic The name of the HETDEX mosaic in which the FITS image can be found N/A N/A
Number_Pointings Number_Pointings The number of pointings that are mosaiced at the position of the source. N/A N/A
Number_Masked Number_Masked The fraction of pointings in which the source is in the deconvolution mask. N/A N/A
Masked_Fraction Masked_Fraction The fraction of the source that is in the CLEAN mask. N/A N/A
Arteface Arteface Whether or not the entry is believed to be an artefact. N/A N/A

Columns that are parts of indices are marked like this.

Other

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