XMM-Newton and INTEGRAL spectroscopy of GRO J1655-40 during its 2005 outburst
- Science Operations and Data Systems Division, Research and Scientific Support Department of ESA, ESAC, Apartado 50727, 28080 Madrid (Spain)
- Astrophysics Mission Division, Research and Scientific Support Department of ESA, ESTEC, Postbus 299, NL-2200 AG Noordwijk (Netherlands)
- Department of Astronomy, University of Michigan, 500 Church Street, Dennison 814, Ann Arbor, MI 48109 (United States)
- Laboratorio de Astrofisica Espacial y Fisica Fundamental, INTA, Apartado 50727, 28080 Madrid (Spain)
We report on two XMM-Newton and simultaneous INTEGRAL observations of the microquasar GRO J1655-40 during its 2005 outburst. The source was in its high-soft state during both observations. There is evidence for the presence of both a relativistically broadened Fe line providing strong support for the existence of a spinning black hole, and a highly photo-ionized absorber. The photo-ionized absorber is responsible for strong K absorption lines of Fe XXV and Fe XXVI in the EPIC pn spectra. The parameters of the highly-ionized absorber were different during the two observations. A less ionized absorber is present in the second observation, where the 0.5-200 keV luminosity of GRO J1655-40 decreased by around a half.
- OSTI ID:
- 21067367
- Journal Information:
- AIP Conference Proceedings, Vol. 924, Issue 1; Conference: International conference on multicolor landscape of compact objects and their explosive origins, Cefalu, Sicily (Italy), 11-24 Jun 2006; Other Information: DOI: 10.1063/1.2774956; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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