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Astron. Astrophys. Suppl. Ser. 135, 273-289

Gigahertz Peaked Spectrum sources from the
Jodrell Bank-VLA Astrometric Survey

I. Sources in the region $35\hbox{$^\circ$}\leq \delta \leq 75\hbox{$^\circ$}$

A. Marecki1 - H. Falcke2 - J. Niezgoda1 - S.T. Garrington3 - A.R. Patnaik2

Send offprint request: H. Falcke,

1 - Centre for Astronomy, N. Copernicus University, ul. Gagarina 11, PL-87-100 Torun, 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

Received May 14; accepted October 13, 1998


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 $35\hbox{$^\circ$}\leq \delta \leq 75\hbox{$^\circ$}$. 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 ($z\mathrel{\mathchoice {\vcenter{\offinterlineskip\halign{\hfil
$\displaystyle ... ) redshifts.

Key words: catalogs -- galaxies: active -- quasars: general -- radio continuum: general

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