Gigahertz Peaked Spectrum sources from the Jodrell Bank–VLA Astrometric Survey^*

I. Sources in the region

¹ Centre for Astronomy, N. Copernicus University, ul. Gagarina 11, PL-87-100 Toruń, Poland
² Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
³ Nuffield Radio Astronomy Laboratories, Jodrell Bank, Cheshire, SK11 9DL, UK

Send offprint request to: H. Falcke

Received: 14 May 1998
Accepted: 13 October 1998

Abstract

Observations with MERLIN at 408 MHz have been used to establish the low-frequency part of the spectra of more than a hundred compact radio sources taken from the part of the Jodrell Bank–VLA Astrometric Survey limited by . These sources were selected from JVAS and other catalogues to have convex spectra between 1.4 and 8.4 GHz, characteristic of Gigahertz Peaked Spectrum (GPS) sources. We have confirmed convex shapes of the spectra of 76 objects (one half of our initial candidates) thereby yielding the largest genuine sample of GPS sources compiled so far. Seven of 17 identified quasars in the sample have large () redshifts.