A rapid increase of the spin frequency of GX301-2 during an unusual apastron X-ray flare observed by Fermi/GBM

Details A rapid increase of the spin frequency of GX301-2 during an unusual apastron X-ray flare observed by Fermi/GBM A rapid increase of the spin frequency of GX301-2 during an unusual apastron X-ray flare observed by Fermi/GBM

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atel.2712....1f&link_type=abstract

The Astronomer's Telegram, #2712

Astronomy and Astrophysics

Astronomy

1

X-Ray, Gamma Ray, Binaries, Pulsars, Transients

Scientific paper

Recent Fermi/GBM observations of the high mass X-ray binary system GX301-2 show an unusually bright flare near the apastron (2010 June 29.85) of its ~41.5 day binary orbit. Earth Occultation flux measurements from June 25.0 - 26.0 were 277+/-112 mCrab (8-12 keV), 426+/-40 mCrab (12-25 keV) and 177+/-64 mCrab (25-50 keV). By June 29.0-30.0 the fluxes increased to 503+/-81 mCrab (8-12 keV), 932+/-35 mCrab (12-25 keV) and 447+/-53 mCrab (25-50 keV).

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