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INTEGRAL observations of the black hole candidate H 1743-322 in outburst

A. N. Parmar·E. Kuulkers·T. Oosterbroek·P. Barr·R. Much·A. Orr O. R. Williams·C. Winkler
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Abstract

INTEGRAL made 3 observations in 2003 April of the black hole candidate H 1743-322 during the rising part, and close to the maximum, of an outburst. H 1743-322 was previously observed in outburst in 1977-1978. The source is located in a crowded region of the sky (l = 357 deg, b = -2 deg) and at least 18 sources are clearly detected in the field of view of the gamma-ray imager during a 277 ksec exposure. These are well known persistent X-ray binaries and 3 transient sources in outburst. The combined 5-200 keV JEM-X and SPI spectrum of H 1743-322 is well fit with an absorbed ((2.5 10E22 atom/cm2) soft (photon index 2.70 +/- 0.09) power-law model consistent with J 1743-322 being in a high/soft state.

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A. N. Parmar, E. Kuulkers, T. Oosterbroek, P. Barr, R. Much, A. Orr O. R. Williams, C. Winkler. 2003-07-28. INTEGRAL observations of the black hole candidate H 1743-322 in outburst. https://doi.org/10.1051/0004-6361%3A20031140

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