Detection and analysis of a new INTEGRAL hard X-ray transient, IGR J17285-2922

A. B. Hill; A. J. Bird; A. J. Dean; D. J. Clark; D. R. Willis; E. J. Barlow; F. Capitanio; L. Bassani; L. Moran; M. Del Santo

arxiv: astro-ph/0505405 · v1 · submitted 2005-05-19 · 🌌 astro-ph

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

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S. E. Shaw D. R. Willis F. Capitanio M. Del Santo L. Bassani

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keywords sourcedetectiongalacticintegralisgrij17285-2922transientx-ray

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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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Detection and analysis of a new INTEGRAL hard X-ray transient, IGR J17285-2922

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