A possible state change in the black-hole candidate IGR J17091-3624

Details A possible state change in the black-hole candidate IGR J17091-3624 A possible state change in the black-hole candidate IGR J17091-3624

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012atel.3916....1d&link_type=abstract

The Astronomer's Telegram, #3916

Astronomy and Astrophysics

Astronomy

X-Ray, Binary, Black Hole, Transient

Scientific paper

The black hole candidate source IGR J17091-3624 (ATel #149, ATel #3144, ATel #3168, ATel #3667) was detected in hard X-rays during the most recent INTEGRAL Galactic Plane Scan observations. The source was observed between UTC 17:57:15 2012-02-05 and 00:38:42 2012-02-06 for an effective exposure of ~ 18.5 ks and 4.3 ks in the IBIS and JEM-X detectors respectively. The source was detected in the IBIS instrument with a flux of 3.52 ± 0.35 counts/sec (20.1 ± 2.0 mCrab, 10 sigma) in the 18 - 40 keV band and 1.76 ± 0.27 counts/sec (20.1 ± 3.1 mCrab, 6.5 sigma) in the 40 - 100 keV band.

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