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Confirmation of IGR J01363 plus 6610 as a Be X-Ray Binary with Very Low Quiescent X-Ray LuminosityThe field containing the candidate High Mass X-ray Binary IGR J01 363+6610 was observed by XMM-Newton on 2009 July 31 for 28 ks. A Be star was previously suggested as the possible counterpart of the INTEGRAL source, and although Chandra, during a 2007 observation, did not detect an X-ray source at the position of the Be star, we find a variable source (XMMU 101 3549.5+661243) with an average X-ray flux of 2 x 10(exp -13)ergs/sq cm/s (0.2-12 keV, unabsorbed) at this position with XMM-Newton. The spectrum of this source is consistent with a hard power law with a photon index of r = 1.4+/-0.3 and a column density of N(sub H) = (15(+0.7/-0.5)) x 10(exp 22)/sq cm (90% confidence errors). These results, along with our optical investigation of other X-ray sources in the field, make the association with the Be star very likely, and the 2 kpc distance estimate for the Be star indicates an X-ray luminosity of 9.1 x 10(exp 31) ergs/s. This is lower than typical for a Be X-ray binary, and the upper limit on the luminosity was even lower ( < 1.4 x 10(exp 3)ergs/s assuming the same spectral model) during the Chandra observation. We discuss possible implications of the very low quiescent luminosity for the physical properties of IGR 101363+6610.
Document ID
20110020278
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Tomsick, John A.
(California Univ. Berkeley, CA, United States)
Heinke, Craig
(Alberta Univ. Edmonton, Alberta, Canada)
Halpern, Jules
(Columbia Univ. New York, NY, United States)
Kaaret, Philip
(Iowa Univ. Iowa City, IA, United States)
Chaty, Sylvain
(Paris Univ. France)
Rodriguez, Jerome
(Paris Univ. France)
Bodaghee, Arash
(California Univ. Berkeley, CA, United States)
Date Acquired
August 25, 2013
Publication Date
February 20, 2011
Publication Information
Publication: Astrophysics Journal
Volume: 728
Issue: 2
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NNX09AP91G
Distribution Limits
Public
Copyright
Other

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