A compiled catalogue of optical positions of extragalactic radio sources

Shanghai Observatory, Shanghai 200030, China

Corresponding author: Send offprint request to: Li Jinling, e-mail: xytan@fudan.ihep.ac.cn

Received: 2 January 1996
Accepted: 15 April 1996

Abstract

Based on 28 individual catalogues, in which the positions of optical counterparts of extragalactic radio sources are listed, we compiled a combined catalogue by means of a weighted least squares adjustment. The catalogue is in the system of FK5/J2000.0. It consists of about five hundred sources, among which there are 56 primary sources with position uncertainties as . Comparisons show that the orientation differences between optical and radio frames are Local relative deformations are not obvious within the precision of ground-based optical observations.