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New source IGR J17544-2619 discovered with INTEGRAL

ATel #190; R. A.Sunyaev (IKI, Moscow; MPA, Garching), S. A.Grebenev (IKI, Moscow), A. A.Lutovinov (IKI, Moscow), J. Rodriguez (CEA/SAp, Saclay), S. Mereghetti (IASF, Milano), D. Gotz (IASF, Milano), T. Courvoisier (ISDC, Versoix) and the shift team
on 17 Sep 2003; 15:15 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: S.A.Grebenev (sergei@hea.iki.rssi.ru)

Subjects: Radio, Infra-Red, X-ray, Request for Observations, Binary, Black Hole, Neutron Star, Transient

Referred to by ATel #: 191, 192, 194, 252, 338, 1266, 1454, 2069

We report the discovery of a new transient source, IGR J17544-2619, with the IBIS/ISGRI detector on board the INTEGRAL observatory. The source position is RA=17h54.4m, DEC= -26d19' (equinox 2000, position uncertainty around 2'). The source was detected during an observation of the Galactic Center field on September 17, 2003 at 01h10 UTC, with a flux of about 160 mCrab, 60 mCrab and less than 15 mCrab (3-sigma upper limit) in the 18-25, 25-50 and 50-100 keV bands. The signal to noise ratio has reached ~36. The source was brigth for about 2 hours and then faded below the detection threshold.

We encourage follow up observations at other wavelengths.