Information on Service 'LoLSS source catalog'

Further access options are discussed below

This service provides the source catalogue of the LOFAR LBA Sky Survey (LoLSS).

For a list of all services and tables belonging to this service's resource, see Information on resource 'LBA survey of HETDEX'

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/lolss/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:

LoLSS - Image Cutout Service

Spatial Coverage

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 size	Deconvolved source size, major axis	arcsec	N/A
dc_min	Deconvolved minor axis size	Deconvolved source size, minor axis	arcsec	N/A
dc_pa	Deconvolved position angle	N/A	deg	N/A
dec	Declination	N/A	deg	pos.eq.dec;meta.main
e_dc_maj	E. deconvolved major axis size	Error on the deconvolved major axis size	arcsec	N/A
e_dc_min	Error deconvolved minor axis size	Error on the deconvolved minor axis size	arcsec	N/A
e_dc_pa	E. deconvolved position angle	N/A	deg	N/A
e_dec	E. declination	N/A	arcsec	pos.eq.dec;stat.error
e_maj	E. major axis size	Error on the major axis size	arcsec	N/A
e_min	E. minor axis size	Error on the minor axis size	arcsec	N/A
e_pa	E. position angle	N/A	deg	N/A
e_peak_flux	E. total flux	Error on peak brightness	mJy/beam	N/A
e_ra	E. right ascension	N/A	arcsec	pos.eq.ra;stat.error
e_tot_flux	E. total flux	Error on the integrated flux density	mJy	N/A
isl_rms	Local rms noise	N/A	mJy/beam	N/A
maj_axis	Major axis size	Source size, major axis	arcsec	N/A
min_axis	Minor axis size	Source size, minor axis	arcsec	N/A
pa	Position angle	N/A	deg	N/A
peak_flux	Total flux	Peak brightness (affected by smearing)	mJy/beam	N/A
ra	Right ascension	N/A	deg	pos.eq.ra;meta.main
s_code	Source code	`S' indicates an isolated source which 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 which are extended and fitted with multiple Gaussians	N/A	meta.code
source	Source name	N/A	N/A	meta.id;meta.main
tot_flux	Total flux	Integrated flux density	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
source	Source name	N/A	N/A	meta.id;meta.main	20
ra	Right ascension	N/A	deg	pos.eq.ra;meta.main	20
dec	Declination	N/A	deg	pos.eq.dec;meta.main	20
e_ra	E. right ascension	N/A	arcsec	pos.eq.ra;stat.error	20
e_dec	E. declination	N/A	arcsec	pos.eq.dec;stat.error	20
tot_flux	Total flux	Integrated flux density	mJy	N/A	20
e_tot_flux	E. total flux	Error on the integrated flux density	mJy	N/A	20
peak_flux	Total flux	Peak brightness (affected by smearing)	mJy/beam	N/A	20
e_peak_flux	E. total flux	Error on peak brightness	mJy/beam	N/A	20
maj_axis	Major axis size	Source size, major axis	arcsec	N/A	20
e_maj	E. major axis size	Error on the major axis size	arcsec	N/A	20
min_axis	Minor axis size	Source size, minor axis	arcsec	N/A	20
e_min	E. minor axis size	Error on the minor axis size	arcsec	N/A	20
pa	Position angle	N/A	deg	N/A	20
e_pa	E. position angle	N/A	deg	N/A	20
dc_maj	Deconvolved major axis size	Deconvolved source size, major axis	arcsec	N/A	20
e_dc_maj	E. deconvolved major axis size	Error on the deconvolved major axis size	arcsec	N/A	20
dc_min	Deconvolved minor axis size	Deconvolved source size, minor axis	arcsec	N/A	20
e_dc_min	Error deconvolved minor axis size	Error on the deconvolved minor axis size	arcsec	N/A	20
dc_pa	Deconvolved position angle	N/A	deg	N/A	20
e_dc_pa	E. deconvolved position angle	N/A	deg	N/A	20
isl_rms	Local rms noise	N/A	mJy/beam	N/A	20
s_code	Source code	`S' indicates an isolated source which 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 which are extended and fitted with multiple Gaussians	N/A	meta.code	20

Copyright, License, Acknowledgements

LoLSS is licensed under the Creative Commons Attribution 3.0 License

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

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