A Westerbork survey of clusters of galaxies. IV. Observations of the Coma cluster at 610 MHz: radio data and identifications.
Abstract
The results of a WSRT full synthesis observation at 610 MHz of an area of 2.6 x IO sterad centered on the Coma cluster are presented. The angular resolution was 53" x 113" and the detection limit at the field centre was 4 mJy. 158 radio sources have been detected, and an optical identification search has been carried out on a 48" Schmidt IIIaJ plate. Maps of the extended sources, and the finding charts of the identifications are given, except for the sources identified with galaxies brighter than m = 17.5 (described in paper III) and the sources already detected at 1415 MHz (described in paper I). The dN/dS distribution of the sources not identified with bright Coma galaxies is presented. For the sources detected also at 1415 MHz the spectral index distribution is given. Key words: radio source survey - clusters of galaxies - identifications - spectral index distribution
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- June 1977
- Bibcode:
- 1977A&AS...28..333V
- Keywords:
-
- Astronomical Catalogs;
- Galactic Clusters;
- Radio Sources (Astronomy);
- Ultrahigh Frequencies;
- Calibrating;
- Identifying;
- Indexes (Ratios);
- Spectral Energy Distribution;
- Astronomy