Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HD 207331 a new $\delta$ Scuti star in the Cygnus field: discovery and
  follow-up observations   Preliminary results on the discovery and follow-up observations of a new
$\delta$ Scuti pulsator in the Cygnus field are presented. The variability of
the star HD 207331 was detected while testing a Str\"omgren spectrophotometer
attached to the H.L. Johnson 1.5-m telescope at the San Pedro M\'artir
observatory, M\'exico. CCD photometric data acquired soon after confirmed its
variability. A few hours of $uvby$ differential photoelectric photometry during
three nights revealed at least two beating periods. A two-site observational
campaign carried out during one week in 2009 confirms the multi-periodic nature
of this new $\delta$ Scuti pulsator.

31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph