Optical searches for ROSAT X ray cluster sources
Abstract
The identification of x-ray sources in the ROSAT (x-ray astronomy satellite) all sky survey relies heavily on comparison of the x-ray positions with those of objects found at other wavelengths. The use of Schmidt telescope surveys, which have achieved the most detailed description of the whole sky to date, is described. The data base which summarizes the characteristics of some 500 million objects identified on the United Kingdom Schmidt plates, is considered. This data base is interrogated routinely in identifying ROSAT sources. A study of x-ray clusters of galaxies in the southern sky is being carried out and automatic techniques used to search for clusters on a Schmidt plate at the location of a ROSAT source are described.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1991
- Bibcode:
- 1991STIN...9229853C
- Keywords:
-
- Galactic Clusters;
- Optical Measurement;
- Rosat Mission;
- X Ray Sources;
- Astronomical Catalogs;
- Data Bases;
- Schmidt Telescopes;
- Sky Surveys (Astronomy);
- Astrophysics