Detection and analysis of a new INTEGRAL hard X-ray transient, IGR J17285-2922
E. J. Barlow, A. J. Bird, D. J. Clark, R. Cornelisse, A. J. Dean, A. B. Hill, L. Moran, V. Sguera, S. E. Shaw, D. R. Willis, F. Capitanio, M. Del Santo, L. Bassani
Abstract
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 14 sigma 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 Gamma=2.1+/-0.17; 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.
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