VizieR Online Data Catalog: M31 second ROSAT PSPC survey (Supper+, 2001)
Abstract
This paper reports the results of the analysis of the second ROSAT PSPC survey of M 31 performed in summer 1992. We compare our results with those of the first survey, already published in Supper et al. (1997, Cat. <J/A+A/317/328>). Within the ~10.7deg2 field of view, 396 individual X-ray sources are detected in the second survey data, of which 164 are new detections. When combined with the first survey, this result in a total of 560 X-ray sources in the field of M 31. Their (0.1keV-2.0keV) fluxes range from 7x10-15erg/cm2/s to 7.6x10-12erg/cm2/s, and of these 560 sources, 55 are tentatively identified with foreground stars, 33 with globular clusters, 16 with supernova remnants, and 10 with radio sources and galaxies (including M 32). A comparison with the results of the Einstein M 31 survey reveals 491 newly detected sources, 11 long term variable sources, and 7 possible transient sources. Comparing the two ROSAT surveys, we come up with 34 long term variable sources and 8 transient candidates. (4 data files).
- Publication:
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VizieR Online Data Catalog
- Pub Date:
- June 2001
- DOI:
- Bibcode:
- 2001yCat..33730063S
- Keywords:
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- Galaxies: nearby;
- X-ray sources;
- Surveys