Recent and past activity of the supergiant fast X-ray transient IGR J17544-2619 as seen by INTEGRAL

Details Recent and past activity of the supergiant fast X-ray transient IGR J17544-2619 as seen by INTEGRAL Recent and past activity of the supergiant fast X-ray transient IGR J17544-2619 as seen by INTEGRAL

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atel.1266....1k&link_type=abstract

The Astronomer's Telegram, #1266

Astronomy and Astrophysics

Astronomy

8

Optical, X-Ray, Gamma Ray, Binaries, Neutron Stars, Transients, Variables

Scientific paper

Following the report of the recent activity seen by Swift/BAT (ATel #1265) we note that the supergiant fast X-ray transient IGR J17544-2619 was also active about one and a half month earlier. During our INTEGRAL Galactic Bulge monitoring observations (see ATels #438, #874 and #1005) on UT 2007 Sep 21 04:10-07:52 the source flared on timescales of half an hour, from around the IBIS/ISGRI detection limits of one pointing (about 10 mCrab) up to 36 +/- 5 mCrab (20-60 keV).

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