%0 Journal Article
%T Multi-wavelength Observations of the Binary System PSR B1259-63/LS~2883 around the 2014 Periastron Passage
%A M. Chernyakova
%A A. Neronov
%A B. van Soelen
%A P. Callanan
%A L. O'Shaughnessy
%A Iu. Babyk
%A S. Tsygankov
%A Ie. Vovk
%A R. Krivonos
%A J. A. Tomsick
%A D. Malyshev
%A J. Li
%A K. Wood
%A D. Torres
%A S. Zhang
%A P. Kretschmar
%A M. V. McSwain
%A D. Buckley
%A C. Koen
%J Physics
%D 2015
%I arXiv
%R 10.1093/mnras/stv1988
%X We report on the results of the extensive multi-wavelength campaign from optical to GeV gamma-rays of the 2014 periastron passage of PSR B1259-63, which is a unique high-mass gamma-ray emitting binary system with a young pulsar companion. Observations demonstrate the stable nature of the post-periastron GeV flare and prove the coincidence of the flare with the start of rapid decay of the H$\alpha$ equivalent width, usually interpreted as a disruption of the Be stellar disk. Intensive X-ray observations reveal changes in the X-ray spectral behaviour happening at the moment of the GeV flare. We demonstrate that these changes can be naturally explained as a result of synchrotron cooling of monoenergetic relativistic electrons injected into the system during the GeV flare.
%U http://arxiv.org/abs/1508.01339v1