A survey by HEAO 1 of clusters of galaxies. III. The complete Abell catalog.
Abstract
A catalog of 128 X-ray emitting clusters, including the Virgo Cluster, is presented. Ninety-one of these are new identifications. The catalog was obtained by searching the HEAO 1 survey observations for coincidences of X-ray sources with Abell clusters. The distribution of these sources in the sky has been examined in search of associations with other Abell clusters, with a null result. The X-ray luminosity has been correlated with cluster richness, but no association with Bautz-Morgan class has been found. The cluster luminosity function has been evaluated, and using this function the contribution of clusters to the diffuse X-ray background radiation has been estimated. It amounts to less than 15% at 2 keV and 3% at 6 keV.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1983
- DOI:
- 10.1086/160790
- Bibcode:
- 1983ApJ...266..425J
- Keywords:
-
- Astronomical Catalogs;
- Galactic Clusters;
- Heao 1;
- X Ray Sources;
- Astronomical Maps;
- Histograms;
- Luminosity;
- Red Shift;
- Spatial Distribution;
- Astronomy