XMM-Newton detection of Nova Muscae 1991 in quiescence

Sutaria, F.K.; Kolb, U.; Charles, P.; Osborne, J.P.; Kuulkers, E.; Casares, J.; Harlaftis, E.T.; Shahbaz, T.; Still, M. and Wheatley, P. (2002). XMM-Newton detection of Nova Muscae 1991 in quiescence. Astronomy and Astrophysics, 391 pp. 993–997.

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DOI (Digital Object Identifier) Link:	http://dx.doi.org/doi:10.1051/0004-6361:20020842
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Abstract

The soft X-ray transient GU Mus has been detected by XMM-Newton in the quiescent state. The source is very faint, with a 0.5-10.0 keV unabsorbed flux of =~ 1.1 x 10-14 ergs cm-2 s-1. The spectra is well fit by an absorbed powerlaw with a photon index of alpha = 1.6 +/- 0.4, close to the value seen when the source was in the low/hard state in Aug. 1991. From our observed luminosity, it seems unlikely that the quiescent state emission is dominated by coronal X-rays from the secondary. The flux also appears to be in agreement with the ADAF model of BH-transients in quiescence.

Item Type:	Journal Article
ISSN:	1432-0746
Extra Information:	Article published by EDP Sciences and available at http://www.edpsciences.org/aa or http://dx.doi.org/10.1051/0004-6361:20020842
Keywords:	X-rays; binaries; X-rays; individuals; GU Mus; black hole physics; accretion; accretion disks
Academic Unit/Department:	Science > Physical Sciences
Interdisciplinary Research Centre:	Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID:	4490
Depositing User:	Users 6827 not found.
Date Deposited:	06 Jul 2006
Last Modified:	17 Feb 2012 08:26
URI:	http://oro.open.ac.uk/id/eprint/4490

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