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

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

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...

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Veröffentlicht in:Astronomy and astrophysics (Berlin) 2005-07, Vol.437 (2), p.L27-L30
Hauptverfasser: Barlow, E. J., Bird, A. J., Clark, D. J., Cornelisse, R., Dean, A. J., Hill, A. B., Moran, L., Sguera, V., Shaw, S. E., Willis, D. R., Capitanio, F., Del Santo, M., Bassani, L.
Format: Artikel
Sprache:eng
Schlagworte:
gamma-rays: observations
surveys
X-rays: binaries
X-rays: individuals: IGR J17285-2922
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Zusammenfassung: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 $\Gamma=2.1 \pm0.17$; 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.
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361:200500131