The LMXRB GX354-0 is flaring in the hard X-rays
ATel #248; Juan Zurita (ISDC Geneva), Angela Bazzano (IASF Roma), Soren Brandt (DSRI Copenhagen), Albert Domingo (LAEFF Madrid), Christoph Winkler (ESA/ESTEC Noordwijk), Serguei Grebenev (IKI Moscow)
on 9 Mar 2004; 12:23 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Roland Walter (Roland.Walter@obs.unige.ch)
Subjects: X-ray, Gamma Ray, Binary, Neutron Star, Transient
GX 354-0 (also known as 4U 1728-34) has been monitored by INTEGRAL as
part of the Galactic Center Deep Exposure almost continuously from
2004-02-16 until now. Over that period the source flux measured by
IBIS/ISGRI between 20-60 keV featured a smooth increase with a maximum
flux of 0.2 Crab measured on February 24th. The source flux then
decreased by a factor of 5 on a time scale of one week. Below 10 keV
the flux measured by JEM-X increased by a factor larger than 6
continuously on a timescale of 3 weeks. The current flux (2004-03-08)
measured by JEM-X in the 3-10 keV band is 0.5 Crab. The INTEGRAL
monitoring will continue for several days.