Letter to the Editor
INTEGRAL observations of the black hole candidate H 1743-322 in outburst*
Research and Scientific Support Department of ESA, ESTEC, Postbus 299, 2200 AG Noordwijk, The Netherlands
Corresponding author: A. N. Parmar, email@example.com
Accepted: 28 July 2003
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 ( and at least 18 sources are clearly detected in the field of view of the ISGRI gamma-ray imager during a 277 ks exposure. These are well known persistent X-ray binary sources 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 atom cm-2) soft (photon index ) power-law model, consistent with H 1743-322 being in a high/soft state.
Key words: accretion, accretion disks / X-rays: individual: H 1743-322 / X-rays: binaries
© ESO, 2003