Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SNR G349.7+0.2: A gamma-ray source in the far 3 kpc arm of the Galactic
  center   We analyze the HI absorption profile for TeV Supernova Remnant (SNR)
G349.7+0.2 based on updated knowledge of the inner Galaxy's structure. We
significantly revise its kinematic distance from the previous ~ 22 kpc to ~11.5
kpc, indicating it is in the far 3 kpc arm of the Galactic center. We give a
revised age of ~ 1800 year for G349.7+0.2 which has a low explosion energy of ~
2.5 x 10^50 ergs. This removes G349.7+0.2 from the set of brightest SNRs in
radio, X-ray to gamma-ray wavebands and helps understand gamma-ray emission
originating from this remnant better. However, one needs to use caution for old
kinematic distances of Galactic objects (e.g. SNRs, Pulsars and HII regions) in
the range of -12 degree =< l =< 12 degree and having distance estimates of >=
5.5 kpc.

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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
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The categories of this paper are: stat
3
The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: nlin
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The categories of this paper are: cmp-lg