Giant outburst of the Be X-ray binary GX 304-1
ATel #4547; P. Jenke (MSFC/NPP), M. H. Finger (USRA), C. A. Wilson-Hodge (NASA/MSFC), V. Connaughton (UAH)
on 5 Nov 2012; 22:15 UT
Credential Certification: Peter Jenke (peter.a.jenke@nasa.gov)
Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar
Referred to by ATel #: 4812
The Be X-ray binary GX 304-1 is currently undergoing a giant outburst. The structure of the outburst thus far consists of a small precursor followed by the giant outburst. The GBM Pulsar Monitor observed the precursor reaching a peak RMS pulsed flux of 87 +/- 3 mCrab in the 12-50 keV band on 56210 MJD (October 10 2012). The RMS pulsed flux then fell to a low of 11 +/- 2 mCrab on 56222 MJD (22 October 2012) before initiating the giant outburst. The RMS pulsed flux on 556234 MJD (3 November 2012) was 252 +/- 5 mCrab and appears to still be climbing. The peak total flux measurement from the GBM Earth Occultation Project is 1.68 +/- .03 Crab (12-50 keV) on 56236 MJD (4 November 2012).
The GBM Pulsar Project
