3-200 keV spectral states and variability of the INTEGRAL Black Hole binary IGR J17464-3213

Abstract

On March 2003, IBIS, the gamma-ray imager on board the INTEGRAL satellite, detected an outburst from a new source, IGR J17464-3213, that turned out to be a HEAO-1 transient, H1743-322. In this paper we report on the high energy behaviour of this BHC studied with the three main instruments onboard INTEGRAL. The data, collected with unprecedented sensitivity in the hard X-Ray range, show a quite hard Comptonised emission from 3 keV up to 150 keV during the rising part of the source outburst, with no thermal emission detectable. A few days later, a prominent soft disk multicolour component appears, with the hard tail luminosity almost unchanged: 10-9 erg*cm-2*s-1. Two months later, during a second monitoring campaign near the end of the outburst, the observed disk component was unchanged. Conversely, the Comptonised emission from the central-hot part of the disk reduced by a factor of 10. We present here its long term behaviour in different energy ranges and the combined JEM-X, SPI and IBIS wide band spectral evolution of this source.

12 pages, 4 figures, accepted for pubblication in APJ

References in corpus (5)

• The INTEGRAL Science Data Centre (ISDC)
• Radiative Processes, Spectral States and Variability of Black-Hole Binaries
• The INTEGRAL/IBIS Scientific Data Analysis
• INTEGRAL observations of five sources in the Galactic Center region
• INTEGRAL observations of the black hole candidate H 1743-322 in outburst

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• Using XMM-Newton to study the energy dependent variability of H 1743-322 during its 2014 outburst
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