Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spatial Distribution of the Galactic Center Diffuse X-Rays and the
  Spectra of the Brightest 6.4keV Clumps   The high energy resolution and low background, particularly in the hard X-ray
band, of the X-ray Imaging Spectrometer onboard Suzaku provide excellent
spectra of the Galactic center diffuse X-rays (GCDX). This paper reports on the
results of spatially resolved spectroscopy of GCDX. The most pronounced
features of GCDX are the K-shell transition lines from neutral (FeI) and
He-like (FeXXV) irons at energies of 6.4keV and 6.7keV, respectively. The
fluxes of these lines are non-uniformly and asymmetrically distributed with
respect to Sgr A*. The 6.4keV lines are particularly bright on the positive
side of the Galactic longitude (east-side) with clumpy structures. A bright
clump near the GC exhibits a time variability over a timescale of a few years.
Neither the 6.4keV nor 6.7keV line flux shows close proportionality to the
continuum flux (5--10keV band); the 6.4keV line shows excess on the high flux
side, and vice versa for the 6.7keV line. On the other hand, the sum of the
6.4keV plus 6.7keV line fluxes with a ratio of 1:2 shows good proportionality
to the continuum flux, and hence we phenomenologically decomposed the continuum
flux of the GCDX into the 6.4keV- and 6.7keV-associated continuums with a flux
ratio of 1:2. Based on these facts, we have tried to estimate the contribution
of diffuse and integrated flux of point sources to the GCDX.

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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex