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Hard X-ray Outburst from Rapid Burster MXB1730-335

ATel #187; R. Sunyaev (IKI, Moscow/MPA, Garching), S. Molkov (IKI, Moscow), A. Lutovinov (IKI, Moscow)
on 30 Aug 2003; 23:53 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, Binary, Neutron Star

We report a detection of the outburst from MXB1730-335 (Rapid Burster) with the INTEGRAL observatory during the deep observation of the Galactic Center field. The source was detected on Aug 28, 2003 with a flux of ~30 mCrab in the 15-40 keV energy band. The observations on Aug 29 UT14:40 - Aug 30 UT11:30, 2003 showed that its flux increased to ~70 mCrab in the 15-40 keV energy band and 20 mCrab in the 40-100 keV energy band.

According to our knowledge this is the strongest outburst in hard X-Rays during the whole history of Rapid Burster observations.