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

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

2003-07-28

arxiv.org/abs/astro-ph/0307474v1

Astron.Astrophys.411:L421-L426,2003

Astronomy and Astrophysics

Astrophysics

5 pages. Figs. 2 and 3 are best viewed in color. To appear in INTEGRAL special edition of A&AL

Scientific paper

10.1051/0004-6361:20031140

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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