Information on Service 'Apertif DR1 - Source catalogue'

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This service queries the continuum catalogue based on the first data release of Apertif continuum images at a central frequency 1355 MHz, with a bandwidth of ~150 MHz and angular resolution of up to 10''. The catalogue contains 249672 radio sources, many of which have been detected for the first time at these frequencies. Source extraction methods are described in Kutkin et al. 2022. A companion VO table contains the continuum images corresponding to this catalogue (see https://vo.astron.nl/apertif_dr1/q/apertif_dr1_continuum_images/form).

For a list of all services and tables belonging to this service's resource, see Information on resource 'Apertif DR-1'

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.

Other services provided on the underlying data include:

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
_r Dist. Distance to cone center deg pos.distance
DC_Maj Deconvolved major axis the FWHM of the deconvolved major axis of the source deg N/A
DC_Min Deconvolved minor axis The FWHM of the deconvolved minor axis of the source deg N/A
DC_PA Deconvolved PA the position angle of the deconvolved major axis of the source measured east of north deg N/A
DEC DEC the declination of the source (for the equinox of the image) deg pos.eq.dec;meta.main
E_DC_Maj Deconvolved major axis error the 1-sigma error on the FWHM of the deconvolved major axis of the source deg N/A
E_DC_Min Deconvolved minor axis error The 1-sigma error on the FWHM of the deconvolved minor axis of the source deg N/A
E_DC_PA Deconvolved PA error the 1-sigma error on the position angle of the deconvolved major axis of the source deg N/A
E_DEC DEC error the 1-sigma error on the declination of the source deg pos.eq.dec;stat.error
E_Peak_flux Peak flu error the 1-sigma error on the peak flux density per beam of the source mJy/beam N/A
E_RA RA error the error on the right ascension of the source deg pos.eq.ra;stat.error
E_Total_flux Total flux error the 1-sigma error on the total flux density of the source mJy N/A
Isl_rms Island background RMS the average background rms value of the island mJy/beam N/A
Name Source name N/A N/A meta.id;meta.main
Peak_flux Peak flux the peak Stokes I flux density per beam of the source mJy/beam N/A
RA RA the right ascension of the source (for the equinox of the image) deg pos.eq.ra;meta.main
S_Code Code A code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sources N/A meta.code
Total_flux Total flux the total, integrated Stokes I flux density of the source at the reference frequency 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
_r Dist. Distance to cone center deg pos.distance 10
Name Source name N/A N/A meta.id;meta.main 20
RA RA the right ascension of the source (for the equinox of the image) deg pos.eq.ra;meta.main 20
E_RA RA error the error on the right ascension of the source deg pos.eq.ra;stat.error 20
DEC DEC the declination of the source (for the equinox of the image) deg pos.eq.dec;meta.main 20
E_DEC DEC error the 1-sigma error on the declination of the source deg pos.eq.dec;stat.error 20
Total_flux Total flux the total, integrated Stokes I flux density of the source at the reference frequency mJy N/A 20
E_Total_flux Total flux error the 1-sigma error on the total flux density of the source mJy N/A 20
Peak_flux Peak flux the peak Stokes I flux density per beam of the source mJy/beam N/A 20
E_Peak_flux Peak flu error the 1-sigma error on the peak flux density per beam of the source mJy/beam N/A 20
DC_Maj Deconvolved major axis the FWHM of the deconvolved major axis of the source deg N/A 20
E_DC_Maj Deconvolved major axis error the 1-sigma error on the FWHM of the deconvolved major axis of the source deg N/A 20
DC_Min Deconvolved minor axis The FWHM of the deconvolved minor axis of the source deg N/A 20
E_DC_Min Deconvolved minor axis error The 1-sigma error on the FWHM of the deconvolved minor axis of the source deg N/A 20
DC_PA Deconvolved PA the position angle of the deconvolved major axis of the source measured east of north deg N/A 20
E_DC_PA Deconvolved PA error the 1-sigma error on the position angle of the deconvolved major axis of the source deg N/A 20
Isl_rms Island background RMS the average background rms value of the island mJy/beam N/A 20
S_Code Code A code that defines the source structure 'S' for single Gaussian, 'M' for multiple Gaussian, 'C' = a single-Gaussian source in an island with other sources N/A meta.code 20

Copyright, License, Acknowledgements

If you use this data, cite Adams et al. 2022 (2022A&A...667A..38A). Additionally, you can cite the service reference. The Apertif data release 1 is licensed under the Creative Commons Attribution 3.0 License

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