Table information for 'lbcs.main'

General

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: 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. If you use this data, cite Jackson et al. 2016 (A&A 595A, 86J). For a description of the catalog format, see https://www.jb.man.ac.uk/~njj/lbcs_stats.sum.

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

Further information

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2016A&A...595A..86J (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

@MISC{vo:lbcs_main,
  year=2016,
  title={{LBCS} Calibrator Search},
  author={Deller, A.},
  url={https://vo.astron.nl/tableinfo/lbcs.main},
  howpublished={{VO} resource provided by the The VO @ {ASTRON}}
}

Fields

Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
ObsID Obs ID LOFAR Observation ID N/A meta.id;meta.main
raj2000 RA Source J2000 Right Ascension, in decimal degrees. deg pos.eq.ra;meta.main
decj2000 DEC Source J2000 Declination, in decimal degrees. deg pos.eq.dec;meta.main
ObsDate Date Observation date. N/A time.epoch;obs
ObsTime Time Observation time. N/A time.epoch;obs
BaselineQual Baseline Quality Goodness of the calibrator on the international stations, judged by signal-to-noise ratio of the fringe fit. N/A N/A
ObsQual Observation Quality Quality of the observation, judged by the percentage of source detections on the shorter baselines. N/A N/A
BaselineQualFT Baseline Quality (FT) Goodness of the calibrator on the international stations, judged by signal-to-noise of the Fourier transform of the data. N/A N/A
ObsFlag Observation Flag Observation flag. N/A N/A

Columns that are parts of indices are marked like this.

Other

The following services may use the data contained in this table:

VOResource

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