2002/03/27 by R. Barnard, U. Kolb, U. C. Kolb +4
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0203475
4 pages, 7 figures, to appear in Proc. Symposium ' New Visions of the X-ray Universe in the XMM-Newton and Chandra Era' ESA SP-488 August 2002
arxiv created 2002/03/27 · arxiv updated 2009/12/01
The XMM-Newton satellite has made four observations of the core of M31 as part of a survey that will span the entire galaxy. The majority of the X-ray emission is contributed by point sources, chiefly X-ray Binaries (XB). Exciting early results from a survey of time variability in three XMM exposures of the M31 core reveal XB exhibiting Sco X-1 like flaring, dips and a burst. The flaring source in M31 also exhibits variability in intensity and spectral hardness that is characteristic of a Z-source.