Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Re-identification of G35.6-0.4 as a supernova remnant   G35.6-0.4 is an extended radio source in the Galactic plane which has
previously been identified as either a supernova remnant or an HII region.
Observations from the VLA Galactic Plane Survey at 1.4 GHz with a resolution of
1 arcmin allow the extent of G35.6-0.4 to be defined for the first time.
Comparison with other radio survey observations show that this source has a
non-thermal spectral index, with alpha -0.47 +/- 0.07. G35.6-0.4 does not have
obvious associated infra-red emission, so it is identified as a Galactic
supernova remnant, not an HII region. It is approximately 15 x 11 arcmin**2 in
extent, showing partial limb brightening.

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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
37
The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph