XMM-Newton Observation of the Black Hole Microquasar GRS 1758-258

(2) Dept. of Physics; A. Decourchelle (1); A. Goldwurm (1); Astronomy; D. Israel (1); France; I. F. Mirabel (1); Leicester University; P. Ferrando (1); P. Goldoni (1)

arxiv: astro-ph/0106310 · v1 · submitted 2001-06-18 · 🌌 astro-ph

XMM-Newton Observation of the Black Hole Microquasar GRS 1758-258

A. Goldwurm (1) , D. Israel (1) , P. Goldoni (1) , P. Ferrando (1) , A. Decourchelle (1) , I. F. Mirabel (1) , R. S. Warwick (2) ((1) Service d'Atrophysique/DAPNIA/CEA , Saclay

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France (2) Dept. of Physics Astronomy Leicester University U.K.)

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keywords blackholestatexmm-newtondatagalacticintermediatemicroquasar

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The XMM-Newton X-ray observatory pointed the galactic black hole candidate and microquasar GRS 1758-258 in September 2000 for about 10 ks during a program devoted to the scan of the Galactic Center regions. Preliminary results from EPIC MOS camera data are presented here. The data indicate that the source underwent a state transition from its standard low-hard state to an intermediate state. For the first time in this source the ultra-soft component of the accretion disk, which black hole binaries display in intermediate or high-soft states, was clearly detected and measured thanks to the high spectral capabilities of XMM-Newton.

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XMM-Newton Observation of the Black Hole Microquasar GRS 1758-258

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