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The X-ray properties of M101 ULX-1=CXOKM101 J140332.74+542102

Mukai, K.; Still, M.; Corbet, R. H. D.; Kuntz, K. D. and Barnard, R. (2005). The X-ray properties of M101 ULX-1=CXOKM101 J140332.74+542102. Astrophysical Journal, 634(2) pp. 1085–1092.

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We report our analysis of X-ray data on M101 ULX-1, concentrating on high-state Chandra and XMM-Newton observations. We find that the high state of M101 ULX-1 may have a preferred recurrence timescale. If so, the underlying clock may have periods around 160 or 190 days, or possibly around 45 days. Its short-term variations resemble those of X-ray binaries at high accretion rates. If this analogy is correct, we infer that the accretor is a 20 40 M-circle dot object. This is consistent with our spectral analysis of the high-state spectra of M101 ULX-1, from which we find no evidence for an extreme (> 10(40) ergs s(-1)) luminosity. We present our interpretation in the framework of a high-mass X-ray binary system consisting of a B supergiant mass donor and a large stellar-mass black hole.

Item Type: Journal Item
Copyright Holders: 2005 The American Astronomical Society
ISSN: 1538-4357
Keywords: galaxies; x-rays; binary stars
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 18166
Depositing User: Colin Smith
Date Deposited: 07 Sep 2009 10:09
Last Modified: 19 Dec 2017 09:59
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