Astronomy and Astrophysics, volume 373, 63-99 (2001/7-1)
The second ROSAT PSPC survey of M 31 and the complete ROSAT PSPC source list.
SUPPER R., HASINGER G., LEWIN W.H.G., MAGNIER E.A., VAN PARADIJS J., PIETSCH W., READ A.M. and TRUEMPER J.
Abstract (from CDS):
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. (1997A&A...317..328S
). 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 7x10–15
/s to 7.6x10–12
/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. For the M 31 sources, the observed luminosities range from 4x1035
erg/s to 4x1038
erg/s. The total (0.1keV-2.0keV) luminosity of M 31 is (3.4±0.3)x1039
erg/s, distributed approximately equally between the bulge and disk. Within the bulge region, the luminosity of a possible diffuse component combined with faint sources below the detection threshold is (2.0±0.5)x1038
erg/s. An explanation in terms of hot gaseous emission leads to a maximum total gas mass of (1.0±0.3)x106
galaxies: fundamental parameters - galaxies: individual: M 31 - galaxies: spiral - X-rays: galaxies
VizieR on-line data:
<Available at CDS (J/A+A/373/63): table5.dat table6.dat table7.dat table8.dat>
Table 5: [SHL2001] NNN (Nos 1-396).
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