Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First detection of 22 GHz H2O masers in TX Camelopardalis   Simultaneous time monitoring observations of H$_{2}$O $6_{16}-5_{23}$, SiO
$J$ = 1--0, 2--1, 3--2, and $^{29}$SiO $v$ = 0, $J$ = 1--0 lines were carried
out in the direction of the Mira variable star TX Cam with the Korean VLBI
Network single dish radio telescopes. For the first time, the H$_{2}$O maser
emission from TX Cam was detected near the stellar velocity at five epochs from
April 10, 2013 ($\phi$ = 3.13) to June 4, 2014 ($\phi$ = 3.89) including
minimum optical phases. The intensities of H$_{2}$O masers are very weak
compared to SiO masers. The variation of peak antenna temperature ratios among
SiO $v$ = 1, $J$ = 1--0, $J$ = 2--1, and $J$ = 3--2 masers is investigated
according to their phases. The shift of peak velocities of H$_{2}$O and SiO
masers with respect to the stellar velocity is also investigated according to
observed optical phases. The H$_{2}$O maser emission occurs around the stellar
velocity during our monitoring interval. On the other hand, the peak velocities
of SiO masers show a spread compared to the stellar velocity. The peak
velocities of SiO $J$ = 2--1, and $J$ = 3--2 masers show a smaller spread with
respect to the stellar velocity than those of SiO $J$ = 1--0 masers. These
simultaneous observations of multi-frequencies will provide a good constraint
for maser pumping models and a good probe for investigating the stellar
atmosphere and envelope according to their different excitation conditions.

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The categories of this paper are: math-ph
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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: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: ao-sci