Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: INTEGRAL observations of Sco X-1: evidence for Comptonization up to 200
  keV   We have analyzed a long-term database for Sco X-1 obtained with the telescope
IBIS onboard the INTEGRAL satellite in order to study the hard X-ray behavior
of Sco X-1 from 20 up to 200 keV. Besides the data used for producing of the
INTEGRAL catalog of sources, this is the longest (412 ks) database of IBIS on
Sco X-1 up to date. The production of hard X-ray tails in low-mass X-ray
binaries is still a matter of debate. Since most of the fits to the high-energy
part of the spectra are done with powerlaw models, the physical mechanism for
the hard X-ray tail production is unclear. The purpose of this study is to
better constrain those possible mechanisms. Our main result shows a strong
correlation between the fluxes in the thermal and nonthermal part of Sco X-1
spectra. We thus suggest that Comptonization of lower energy photons is the
mechanism for producing hard X-ray tails in Sco X-1.

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The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
32
The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
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The categories of this paper are: nlin