Information on Service 'LOFARTIER 1 Source Catalogue'

Further access options are discussed below

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 'LOFARTIER 1 Source Catalogue'

Service Documentation

Overview

You can access this service using:

static -- static (i.e. prepared) data or custom client-side code; probably used to access ancillary files here
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/lofartier1/lofartier1.xml/cone/scs.xml? to access the service

This service is published as follows:

Within the set(s) local with the renderer form

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):

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
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
Resolved	Resolved	A flag indicating whether the source is resolved (R) or unresolved (U).	N/A	N/A
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.

Name	Table Head	Description	Unit	UCD	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
Resolved	Resolved	A flag indicating whether the source is resolved (R) or unresolved (U).	N/A	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)

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