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IGR J18325-0756

ATel #154; Lutovinov A. (IKI, Moscow), Shaw S. (ISDC/Southampton), L. Foschini (IASF/CNR, Sezione di Bologna), J. Paul (CEA, Saclay)
on 28 Apr 2003; 13:20 UT
Distributed as an Instant Email Notice Request For Observations
Credential Certification: A.Lutovinov (aal@hea.iki.rssi.ru)

Subjects: X-ray, Gamma Ray, Request for Observations, Transient

Referred to by ATel #: 1423

We report the discovery of a new transient source, IGR J18325-0756, with the IBIS/ISGRI detector onboard the INTEGRAL observatory. Its position is RA=18h32.5m and Dec=-07o56m (equinox 2000, position uncertainty ~3').

The source was first detected during observations of the Galactic Centre field performed between April 23 UT 00:08 and April 25 UT 11:34, with fluxes ~10 mCrab in the 15-40 keV band and ~5 mCrab in the 40-100 keV band. Its flux increased by a factor of 1.5 in both energy bands during similar observations performed between April 25 UT 23:50 and April 27 UT 07:54. Between UT 08:20 - 08:50 on April 27 the source flux increased further up to an intensity of ~40 mCrab and ~25 mCrab in the two respective energy bands. Immediately afterwards the source flux drops to the values measured on April 23-25 and remained so till April 28 UT 04:00.

We encourage follow up observations at various wavelengths.