Volume 437, Number 2, July II 2005
|Page(s)||L27 - L30|
|Published online||21 June 2005|
Letter to the Editor
Detection and analysis of a new INTEGRAL hard X-ray transient, IGR J17285-2922
School of Physics and Astronomy, University of Southampton, Highfield, SO17 1BJ, UK e-mail: email@example.com
2 Science Data Centre, 1290 Versoix, Switzerland
3 IASF/CNR, via del Fosso del Cavaliere 100, 00133 Roma, Italy
4 IASF/CNR Section of Bologna, via P. Gobetti 101, 40129 Bologna, Italy
Accepted: 22 May 2005
We present the transient nature of INTEGRAL source IGR J17285–2922, identified from a single period of activity during an IBIS/ISGRI Galactic Centre Deep Exposure in September 2003. The source has a maximum detection significance of 14σ in the 20–100 keV energy range and exhibits a flux of 6.5 mCrab before it moves out of the ISGRI field of view. The source is visible to at least 150 keV and its spectrum can be fit with a power law slope of ; a more physical model could not be fit due to poor statistics. Detected characteristics are consistent with the source being a Galactic low-mass X-ray binary harbouring a black hole or neutron star.
Key words: gamma-rays: observations / surveys / X-rays: individuals: IGR J17285-2922 / X-rays: binaries
© ESO, 2005
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