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 (firstname.lastname@example.org)
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
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.