A&A Supplement series, Vol. 128, February II 1998, 153-178

Received April 16; accepted June 25, 1997

The revised GB/GB2 sample of extragalactic radio sources

J. Machalski

Send offprint request: J. Machalski e-mail: machalsk@oa.uj.edu.pl
Obserwatorium Astronomiczne, Uniwersytet Jagiellonski, ul. Orla 171, 30-244 Kraków, Poland

Abstract:

This paper presents the revised sample of 373 extragalactic radio sources brighter than 0.2 Jy at 1.4 GHz. These sources, selected from the finding Green Bank surveys, were mapped at 1465 MHz using the VLA at different configurations. The biases introduced into the original GB and GB2 catalogues by confusion as well as partial resolution by the VLA at A-configuration, are eliminated. In effect, a number of sources have been excluded, and a few other are included into the revised sample. Now the sample is about 99, 97, and 95 per cent complete for sources with , , and , respectively. A compilation of the radio, optical, and X-ray data available for the sample sources are presented in Table A3 (click here). New 4.9-GHz VLA images of selected sources are included. A number of statistics describing radio morphological and spectral contents of the sample, radio variability, revised source counts, redshift distributions, etc. are given.

keywords: surveys -- quasars: general -- galaxies:
active -- radio continuum: general; galaxies

• 1. Introduction
• 2. The sample
• 3. The radio data
• 4. The optical and X-ray data
• 5. Summary of the radio, optical, and X-ray data
• 6. The statistics
• Appendix
• References