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Title: XMM-Newton detection of Nova Muscae 1991 in quiescence
Authors: Sutaria, F. K.
Kolb, U.
Charles, P.
Osborne, J. P.
Kuulkers, E.
Casares, J.
Harlaftis, E. T.
Shahbaz, T.
Still, M.
Wheatley, P.
First Published: 1-Sep-2002
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2002, 391 (3), pp. 993-997
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 $\simeq $ $1.1 \times 10^{-14}$ ergs cm -2 s -1. The spectra is well fit by an absorbed powerlaw with a photon index of $ \alpha = 1.6 \pm 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.
DOI Link: 10.1051/0004-6361:20020842
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2002 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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