INTEGRAL detection of a strong outburst in 4U 1954+31

Details INTEGRAL detection of a strong outburst in 4U 1954+31 INTEGRAL detection of a strong outburst in 4U 1954+31

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atel..796....1p&link_type=abstract

The Astronomer's Telegram, #796

Astronomy and Astrophysics

Astronomy

7

X-Ray, Gamma Ray, Binaries, Transients

Scientific paper

We report the dectection of a ~150 mCrab outburst in the transient high mass X-ray binary 4U 1954+31, observed in the Galactic Plane Survey (GPS) by INTEGRAL. The flux in the IBIS/ISGRI instrument reached 17.7 counts/s (165 mCrab, 32-sigma detection) in the 20-40 keV band. The observations started at 00:14 UTC on Apr 15, 2006. The flux was already ~15 counts/s (140 mcrab). It peaked 40 min later, and then fell to about 10 counts/s (95 mcrab).

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