Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The BeppoSAX view of the Galactic Center region   The Galactic Center Region has been surveyed in 1997-1998 with the Narrow
Field Instruments on-board the BeppoSAX satellite (2-10keV energy range). The
X-ray emission from SgrA*, the putative supermassive black hole at the center
of our Galaxy, has been measured and its spectrum studied, together with the
X-ray emission from several bright X-ray sources, LMXBs containing neutron
stars and black holes located within the region ($|l|<2\deg)\times(|b|<1\deg$).
New point-like X-ray sources have also been discovered. The results on the
diffuse emission coming from the SgrA Complex are summarized here: it displays
a two-temperature thermal spectrum (kT1~0.6keV and kT2~8keV) and an
energy-dependent morphology, with the hard emission (5-10 keV) elongated along
the galactic plane and the soft one (2-5 keV) spatially correlated with the
radio halo of SgrAEast. The results of the study of the diffuse X-ray emission
from other three fields in the Galactic Center Region containing the giant
molecular clouds SgrB2, SgrC and SgrD are reported for the first time. The
diffuse emission from the direction of these three molecular clouds shows a
double temperature nature as well, with a prominent iron line at \~6.7keV, the
intensity and equivalent width of which depends on the galactic longitude.
Moreover, the SgrB2 spectrum shows an intense 6.4keV line of fluorescent
origin. While the hard component of the Galactic Center diffuse emission
displays a similar temperature with respect to the Galactic Ridge, the low
temperature plasma is significantly softer. This may be due to a net
contribution produced from the accretion of material onto old isolated neutron
stars located inside the giant molecular clouds.

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The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci