A new hard X-ray transient discovered by INTEGRAL: IGRJ17498-2921

Details A new hard X-ray transient discovered by INTEGRAL: IGRJ17498-2921 A new hard X-ray transient discovered by INTEGRAL: IGRJ17498-2921

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3551....1g&link_type=abstract

The Astronomer's Telegram, #3551

Astronomy and Astrophysics

Astronomy

2

X-Ray, Gamma Ray, Binary, Black Hole, Neutron Star, Transient

Scientific paper

INTEGRAL discovered a new hard X-ray transient, IGR J17498-2921, during the observations performed from 2011-08-11 22:45 to 2011-08-12 05:54 UTC.
The source is detected in the IBIS/ISGRI mosaic at a preliminary significance level of 11 and 9 sigma in the 20-40 keV and 40-80 keV energy bands, respectively. The corresponding fluxes are 19+/-2 and 23+/-3 mCrab (68% c.l., only statistical).
The best determined source position is at RA=17:49:49; DEC=-29:21:14 (J2000) with a 90% confinement radius of 2.3 arcmin.
The IBIS/ISGRI spectrum (exposure time 15.9 ks) can be well described by a a power-law with photon index 1.9+/-0.4 (90% c.l.).

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