Information on Service 'LoTSS-PDR Source Catalogue'

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The LOFAR HBA Tier-1 preliminary 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.

For a list of all services and tables belonging to this service's resource, see Information on resource 'LoTSS-PDR Source Catalogue'

Service Documentation

Overview

You can access this service using:

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
hscs_pos Position/Name Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object N/A N/A
hscs_sr Search radius Search radius in arcminutes N/A N/A
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
RESPONSEFORMAT Output Format File format requested for output. N/A meta.code.mime
SR Search Radius Search radius deg N/A
VERB Verbosity Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns. N/A N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
DEC Dec Source J2000 Declination, in decimal degrees. deg pos.eq.dec;meta.main
E_DEC error Dec Error in source J2000 Declination, in arcseconds This is the formal error based on the source position fit. arcsec stat.error;pos.eq.dec
E_DEC_tot tot. error Dec Total error in source J2000 Declination, in arc seconds. This includes the formal error based on the source position fit and the systematic positional error. arcsec stat.error;pos.eq.dec
E_Peak_flux error Peak flux Error in the source peak flux density in mJy/beam. This is the formal error based on the source position fit. mJy/beam N/A
E_Peak_flux_tot tot. error Peak flux Total 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/beam N/A
E_RA error RA Error in source J2000 Right Ascension, in arcseconds This is the formal error based on the source position fit. arcsec stat.error;pos.eq.ra
E_RA_tot tot. error RA Error in source J2000 Right Ascension, in arc seconds. This includes the formal error based on the source position fit and the systematic positional error. arcsec stat.error;pos.eq.ra
E_Total_flux error Total flux Error in the source integrated flux density in mJy. This is the formal error based on the source position fit. mJy N/A
E_Total_flux_tot tot. error Total flux Total error in the source integrated flux density in Jy. This includes the formal error based on the source position fit and the flux. mJy N/A
Isl_rms RMS noise The local rms noise in mJy/beam mJy/beam N/A
Mosaic_ID Mosaic The name of the mosaic from which the the source entry was extracted. N/A N/A
Peak_flux Peak flux Source peak flux density, in mJy/beam mJy/beam N/A
RA RA Source J2000 Right Ascension, in decimal degrees. deg pos.eq.ra;meta.main
S_Code Gaus A 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. N/A N/A
Source_id ID Source ID, formed as Jhhmmss+ddmmss using the IAU convention. N/A meta.id;meta.main
Total_flux Total flux Source integrated flux density, in mJy mJy N/A

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
Source_id ID Source ID, formed as Jhhmmss+ddmmss using the IAU convention. N/A meta.id;meta.main 1
RA RA Source J2000 Right Ascension, in decimal degrees. deg pos.eq.ra;meta.main 1
E_RA error RA Error in source J2000 Right Ascension, in arcseconds This is the formal error based on the source position fit. arcsec stat.error;pos.eq.ra 1
E_RA_tot tot. error RA Error in source J2000 Right Ascension, in arc seconds. This includes the formal error based on the source position fit and the systematic positional error. arcsec stat.error;pos.eq.ra 1
DEC Dec Source J2000 Declination, in decimal degrees. deg pos.eq.dec;meta.main 1
E_DEC error Dec Error in source J2000 Declination, in arcseconds This is the formal error based on the source position fit. arcsec stat.error;pos.eq.dec 1
E_DEC_tot tot. error Dec Total error in source J2000 Declination, in arc seconds. This includes the formal error based on the source position fit and the systematic positional error. arcsec stat.error;pos.eq.dec 1
Peak_flux Peak flux Source peak flux density, in mJy/beam mJy/beam N/A 1
E_Peak_flux error Peak flux Error in the source peak flux density in mJy/beam. This is the formal error based on the source position fit. mJy/beam N/A 1
E_Peak_flux_tot tot. error Peak flux Total 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/beam N/A 1
Total_flux Total flux Source integrated flux density, in mJy mJy N/A 1
E_Total_flux error Total flux Error in the source integrated flux density in mJy. This is the formal error based on the source position fit. mJy N/A 1
E_Total_flux_tot tot. error Total flux Total error in the source integrated flux density in Jy. This includes the formal error based on the source position fit and the flux. mJy N/A 1
Isl_rms RMS noise The local rms noise in mJy/beam mJy/beam N/A 1
S_Code Gaus A 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. N/A N/A 1
Mosaic_ID Mosaic The name of the mosaic from which the the source entry was extracted. N/A N/A 1

VOResource XML (that's something exclusively for VO nerds)