Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of orbital and superorbital variability of LSI +61 303 with X-ray
  data   LSI +61 303 is one of the few X-ray binaries with a Be star companion from
which radio, X-rays and high-energy gamma-ray (GeV and TeV) emission have been
observed. The nature of the high energy activity of the system is not yet fully
understood, but it is widely believed that it is generated due to the
interaction of the relativistic electrons leaving the compact object with the
photons and non-relativistic wind of the Be star. The superorbital variability
of the system has been observed in the radio, optical and X-ray domains and
could be due to the cyclic change of the Be star disk size. In this paper we
systematically review all publicly available data from Suzaku, XMM-Newton,
Chandra and Swift observatories in order to measure the absorption profile of
the circumstellar Be disk as a function of orbital and superorbital phases. We
also discuss short-term variability of the system, found during the analysis
and its implications for the understanding of the physical processes in this
system.

37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex