An XMM-Newton survey of M 31

  title={An XMM-Newton survey of M 31},
  author={Wolfgang Pietsch and Michael J. Freyberg and Frank Haberl},
  journal={Astronomy and Astrophysics},
In an analysis of XMM-Newton archival observations of the bright Local Group spiral galaxy M 31 we study the population of X-ray sources (X-ray binaries, supernova remnants) down to a 0.2-4.5 keV luminosity of 4.4 × 10 34 erg s −1 . EPIC hardness ratios and optical and radio information are used to distinguish between different source classes. The survey detects 856 sources in an area of 1.24 square degrees. We correlate our sources with earlier M 31 X-ray catalogues and use information from… 

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