Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20515502k&link_type=abstract
American Astronomical Society Meeting 205, #155.02; Bulletin of the American Astronomical Society, Vol. 36, p.1606
Astronomy and Astrophysics
Astronomy
Scientific paper
The Chandra 1 Msec exposure of M101, which will be completed in November 2004, provides the deepest X-ray image of an entire galaxy, with a limiting luminosity of 1036 ergs/s over the bulk of the disk of this face-on spiral.In the central part of the disk we expect to reach a limiting luminosity of a few times 1035 erg/s. A three-color mosaic of 16 HST ACS pointings allows us to identify optical counterparts to roughly half of the X-ray sources. We will also present the first results of the temporal behavior of the X-ray sources. The diffuse X-ray emission clearly follows the spiral arms and is well correlated with the ultraviolet emission observed with the XMM-OM. The hardness ratio of the X-ray emission does not vary significantly on kpc scales. Fits to the spectrum of the diffuse emission as observed by Chandra and XMM suggest two thermal components with temperatures of 0.2 and 0.6 keV. We will also discuss the spectroscopic confirmation of the identification of M101 ULX-1 with a B star counterpart.
Chandra/HST M101 Collaboration
Kuntz Kip D.
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