Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An AST/RO Survey of CO(4-3) in ultracompact HII regions   The Antarctic Submillimeter Telescope and Remote Observatory (AST/RO) has
been used to observe 78 of the IRAS point sources identified by Bronfman et al.
(1996) as likely ultracompact HII regions. Results for the CO(4-3) line at
461.041GHz are presented. The 74 sources detected are bright and in many cases
compact, making them potentially suitable as pointing calibrators for single
dish submillimeter telescopes.

29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph