Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chandra Imaging of the Gamma-Ray Source GeV J1809-2327   We report on Chandra imaging observations of the Galactic Unidentified
$\gamma$-ray source GEV J1809-2327, comparing the X-ray images with new VLA
1.46 GHz and 4.86 GHz maps. The X-ray images reveal a point source connected to
a non-thermal X-ray/radio nebula, supporting a pulsar/wind model for the
$\gamma$-ray emitter. We also detect numerous X-ray sources from the young
stellar association in the adjacent HII region S32.

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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
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The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: solv-int
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: q-fin