IGR J18539+0727
ATel #151; A. Lutovinov (IKI, Moscow), J. Rodriguez (CEA, Saclay), N. Produit (ISDC), N. Lund (DSRI, Copenhagen), W. Hermsen (SRON, Utrecht), R. Much (ESA/ESTEC)
on 21 Apr 2003; 12:34 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 #: 158
We report the discovery with the IBIS/ISGRI detector onboard the
INTEGRAL observatory of a new transient source IGR J18539+0727.
The source was detected during a routine scan of the Galactic
Plane and deep observations of GRS1915+105 field on April 17-18.
Its position is RA=18h53.9m and DEC=+7o27m (equinox 2000,
position uncertainty ~3'). It seems that the source has a rather
hard spectrum and its detected flux is ~20 mCrab in both,
15-40 keV and 40-100 keV energy bands.
The source did not appear in either of the energy bands in
observations on the same field on April 1, with upper limits
~5 mCrab.
We encourage follow up observations at various wavelengths.
