Information on Service 'Apertif DR Bootes - Catalogue'

Further access options are discussed below

Apertif 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. This service queries the source catalogue of the Boötes field.

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

Overview

You can access this service using:

form -- allows access via an HTML form
scs.xml -- a standard SCS interface as defined by the IVOA to access catalog-type data; SCS clients use https://vo.astron.nl/apertif_dr_bootes/q/cone/scs.xml? to access the service

This service is published as follows:

Within the set(s) local with the renderer form
Within the set(s) ivo_managed with the renderer scs.xml
Within the set(s) ivo_managed with the renderer tap

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:

Apertif DR Bootes - Mosaic

Input Fields

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

Name	Table Head	Description	Unit	UCD
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.

Name	Table Head	Description	Unit	UCD
_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.

Name	Table Head	Description	Unit	UCD	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 Kutkin et al. 2023 (2023A&A...676A..37K). Additionally, you can cite the service reference. The Apertif Bootes data release is licensed under the Creative Commons Attribution 3.0 License

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

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