Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: OH Masers in G11.904-0.141   The massive star-forming region G11.904-0.141 is one of only 11 sources to
show maser emission in the highly-excited 13441 MHz transition of OH. VLBA
observations of the 1665, 1667, 4765, and 13441 MHz transitions of OH toward
G11.904-0.141 are presented. Masers are detected at 1665, 1667, and 4765 MHz,
but the 13441 MHz masers are not detected. Consistent magnetic field strengths
of approximately +3.5 mG are detected in the ground-state masers, in contrast
with a possible -3.0 mG magnetic field previously detected at 13441 MHz. The
variable 13441 MHz masers may be associated with an outflow.

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The categories of this paper are: adap-org
16
The categories of this paper are: stat
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: eess
4
The categories of this paper are: cond-mat