Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The contact system V566 Ophiuchi revisited   New CCD photometric observations of the eclipsing binary V566 Oph have been
obtained. The light curves are analyzed with the Wilson-Devinney code and new
geometric and photometric elements are derived. A new O-C analysis of the
system is presented and apparent period changes are discussed with respect to
possible Light-Time Effect in the system.

26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph