Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sf2a.conf..567e&link_type=abstract
SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: G. Alecian, K. Belkacem,
Astronomy and Astrophysics
Astrophysics
Line: Formation, Line: Identification, Stars: Neutron, Stars: Individual: Mxb 1728--34, X-Ray: Binaries, X-Ray: General
Scientific paper
We analyzed an XMM observation of the low-mass X-ray binary and atoll source mxb. The source was in a low-luminosity state during the XMM observation, corresponding to a bolometric X-ray luminosity of 5 × 10^{36} d_{5.1 kpc}^2 erg s^{-1}. The 1-11 keV X-ray spectrum of the source, obtained combining data from all the five instruments on-board XMM, is well fitted by a Comptonized continuum. Evident residuals are present at 6-7 keV, which are ascribed to the presence of a broad iron emission line. This feature can be equally well fitted by a relativistically smeared line or by a self-consistent, relativistically smeared reflection model. Under the hypothesis that the iron line is produced by reflection from the inner accretion disk, we can infer important information on the physical parameters of the system, such as the inner disk radius, R_{in} = 25-100 km, and the inclination of the system, 44° < i < 60°.
Barragan Laura
Burderi Luciano
D'Aì Antonino
Dauser Thomas
di Salvo Tiziana
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