| Issue |
A&A
Volume 411, Number 1, November III 2003
Special letters issue on: first science with integral
|
|
|---|---|---|
| Page(s) | L421 - L425 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20031140 | |
| Published online | 17 November 2003 | |
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, aparmar@esa.int
Received:
11
July
2003
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
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