Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Timing Characteristics of the Hard X-ray Emission from Bright X-ray
  Pulsars Based on INTEGRAL Data   We review the results of a timing analysis of the observations for ten bright
X-ray pulsars (with fluxes >100 mCrab in the 20-100 keV energy band) that fell
within the INTEGRAL field of view from 2003 to 2007. The dependence of the
pulse profile on the energy and intrinsic source luminosity has been
investigated; particular attention has been paid to searching for changes in
the pulse profile near the cyclotron frequency. The dependence of the pulsed
fraction for X-ray pulsars on their luminosity and energy band has been studied
in detail for the first time.

28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics