Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The first detection of Compton Reflection in the Low-Mass X-ray Binary
  4U1705-44 with INTEGRAL and BeppoSAX   We present data from INTEGRAL and BeppoSAX satellites showing spectral state
transitions of the neutron-star, atoll-type, low-mass X-ray binary 1705-44. Its
energy spectrum can be described as the sum of one or two blackbody components,
a 6.4-keV Fe line, and a component due to thermal Comptonization. In addition,
and for the first time in this source, we find a strong signature of Compton
reflection, presumably due to illumination of the optically-thick accretion
disk by the Comptonization spectrum. The two blackbody components, which the
soft-state data require, presumably arise from both the disk and the
neutron-star surface. The Comptonization probably takes place in a hot inner
flow irradiated by some of the blackbody photons. The spectral transitions are
shown to be associated with variations in the bolometric luminosity, most
likely proportional to the accretion rate. Indipendentely from the spectral
state, we also see changes in the temperature of the Comptonizing electrons and
the strength of Compton reflection.

15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys