M31 second ROSAT PSPC survey (Supper+, 2001)

Details M31 second ROSAT PSPC survey (Supper+, 2001) M31 second ROSAT PSPC survey (Supper+, 2001)

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ycat..33730063s&link_type=abstract

VizieR On-line Data Catalog: J/A+A/373/63. Originally published in: 2001A&A...373...63S

Computer Science

Galaxies: Nearby, X-Ray Sources, Surveys

Scientific paper

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. ). 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).

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