X-Ray Surveys as Tools to Investigate the Cosmological Evolution of Quasars, BL Lac Objects and Clusters of Galaxies /
Abstract
A progress report on a major extension of the Einstein Observatory Medium Sensitivity Survey (MSS) is presented. The MSS consists of X-ray sources serendipitously discovered with the IPC on board the Einstein Observatory in the energy range 0.3-3.5 keV, at fluxes between 10 to the -11th and 10 to the -13th ergs/sq cm/s. The basic properties of the extragalactic sources identified with AGN and clusters of galaxies are discussed.
- Publication:
-
Observational Cosmology
- Pub Date:
- 1987
- Bibcode:
- 1987IAUS..124..593G
- Keywords:
-
- Bl Lacertae Objects;
- Galactic Clusters;
- Quasars;
- X Ray Astronomy;
- Active Galactic Nuclei;
- Heao 2;
- Proportional Counters;
- Astrophysics