Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-wavelength Observations of the Binary System PSR B1259-63/LS~2883
  around the 2014 Periastron Passage   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.

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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: quant-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg