Fluxes of Faint Radio Sources at 2.7/4.75 GHz Virtual Observatory Resource

Authors
  1. Forkert
  2. T. and Altschuler
  3. D. R.
  4. Published by
    CDS
Abstract

This table is a compilation of revised 4.75 GHz and 2.695 GHz flux densities and corresponding spectral indices at epoch 1986.2 of a catalog of 239 sources, which has previously been published by Forkert and Altschuler, (1987A&AS...70...77F). It comprises 209 sources (marked 'A'), forming a complete, flux density limited sample above 50 mJy at 4.76 GHz in 1981.9 (Altschuler, 1986A&AS...65..267A), and 30 sources (marked 'a') below this limit, but with 5.0 GHz flux densities from 1971.0 (Davis, 1971AJ.....76..980D). The catalogue covers a narrow strip of the sky around declination of 33 degrees. The flux densities were calibrated with 3C286 on the scale of Kellermann, Pauliny-Toth and Williams (1969ApJ...157....1K). After publication of the catalog a statistical analysis for flux density variability in the data has been performed (Forkert, 1990), using 6cm flux density measurements of Davis (1971AJ.....76..980D) and Altschuler (1986A&AS...65..267A) and the 2.695 GHz flux densities of Pauliny-Toth et al. (1974A&A....35..421P), the details and results of which are going to be published elsewhere (Altschuler & Forkert, in preparation). For the purposes of this analysis it has become necessary to obtain more individual error estimates of the 1986.2 data, not dominated by the effect of overall scale errors. This revision for some of the sources also led to slightly different flux densities from those previously published. The variability study proved the flux density errors to represent the individual 1-sigma uncertainties, WITHOUT the effect of overall scale errors. From the aforementioned comparison with other measurements scale errors of ~1% at 2.695 GHz and ~3% at 4.75 GHz seem likely.

Keywords
  1. Radio continuum emission
  2. Radio sources
Bibliographic source Bibcode
1987A&AS...70...77F
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/VIII/57
IVOA Identifier IVOID
ivo://CDS.VizieR/VIII/57

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=VIII/57
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=VIII/57
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=VIII/57
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/VIII/57/radfaint?
https://vizier.iucaa.in/viz-bin/conesearch/VIII/57/radfaint?
http://vizieridia.saao.ac.za/viz-bin/conesearch/VIII/57/radfaint?

History

1999-07-11T09:25:53Z
Resource record created
1999-07-11T09:25:53Z
Created
2013-03-06T06:17:08Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr