Broad-Band Spectrum of the Black Hole Candidate IGR J17497-2821 Studied with Suzaku

Details Broad-Band Spectrum of the Black Hole Candidate IGR J17497-2821 Studied with Suzaku Broad-Band Spectrum of the Black Hole Candidate IGR J17497-2821 Studied with Suzaku

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasj...61s.107p&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.61, No.SP1, pp.S107--S113

Physics

2

Accretion Disks, Black Hole Physics, Stars: Individual (Igr J17497-2821), X-Ray: Binaries

Scientific paper

The broad-band 1--300keV Suzaku spectrum of IGR J17497-2821, the X-ray transient discovered by INTEGRAL in 2006 September, is presented. Suzaku observed IGR J17497-2821 on September 25, eight days after its discovery, for a net exposure of about 53 ks. During the Suzaku observation, IGR J17497-2821 is very bright, 2 × 1037erg s-1 at 8kpc in the 1--300keV range, and shows a hard spectrum, typical of black hole candidates in the low-hard state. Despite the multi-mission X-ray monitoring of the source, only with Suzaku is it possible to obtain a broad-band spectrum in the 1--300keV range with a very high signal to noise ratio. A sum of a multi-color disc and a thermal Comptonization component with mild reflection is a good representation of our IGR J17497-2821 Suzaku spectrum. The spectral properties of the accretion disc as well as the cut-off energy in the spectrum at about 150keV are clearly detected and constrained. We discuss the implications on the physical model used to interpret the data and the comparison with previous results.

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