Information on Service 'LBCS Calibrator Search'

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This service queries the catalog of calibrators from the LOFAR Long-Baseline Calibrator Survey (LBCS). The LBCS aims to identify sources suitable for calibrating the highest-resolution observations made with the International LOFAR Telescope, which include baselines >1000 km. Suitable sources must contain significant correlated flux density (>50 − 100 mJy) at frequencies around 110–190 MHz on scales of a few hundred milliarcseconds.

For a list of all services and tables belonging to this service's resource, see Information on resource 'LBCS Calibrator Search'

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
BaselineQual Baselines N/A N/A N/A
decj2000 DEC Source J2000 Declination, in decimal degrees. deg pos.eq.dec;meta.main
ObsDate Date N/A N/A time.epoch;obs
ObsID Obs ID LOFAR Observation ID N/A meta.id;meta.main
ObsQual Quality N/A N/A N/A
ObsTime Time N/A N/A time.epoch;obs
raj2000 RA Source J2000 Right Ascension, in decimal degrees. deg pos.eq.ra;meta.main

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
ObsID Obs ID LOFAR Observation ID N/A meta.id;meta.main 1
raj2000 RA Source J2000 Right Ascension, in decimal degrees. deg pos.eq.ra;meta.main 1
decj2000 DEC Source J2000 Declination, in decimal degrees. deg pos.eq.dec;meta.main 1
ObsDate Date N/A N/A time.epoch;obs 20
ObsTime Time N/A N/A time.epoch;obs 20
BaselineQual Baselines N/A N/A N/A 20
ObsQual Quality N/A N/A N/A 20

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