Fermi/GBM detecting Be X-ray binary GS 0834-430
ATel #4235; P. Jenke (MSFC/NPP), M. H. Finger (USRA), V. Connaughton (UAH)
on 2 Jul 2012; 22:49 UT
Credential Certification: Peter Jenke (peter.a.jenke@nasa.gov)
Subjects: X-ray, Binary, Neutron Star, Transient, Pulsar
Referred to by ATel #: 8175
Pulsed X-ray flux is being detected by Fermi/GBM from the transient Be X-ray binary GS 0834-430 which was previously reported as active by Drave et al. (ATel #4218). Pulsations were first detected in the Fermi/GBM data of 28.0 to 30.0 June with a pulsed flux of 8.4 +/- 1.4 mCrabs and a barycentric frequency of 81.3357(4) mHz and again in the data of 30.0 June to 2.0 July with a pulsed flux of 11.8 +/- 1.3 mCrabs and a barycentric frequency of 81.3377(3) mHz. From Aoki et al. (1992) we estimate an r.m.s. pulse fraction of 7% implying a total flux of 170 mCrabs in the second interval. The change in frequency between the two intervals results in a frequency rate of (1.1 +/- 0.3) E-11 Hz/s.
GBM Pulsar Project
