Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Data Mining for Dwarf Novae in SDSS, GALEX and Astrometric Catalogues   By cross matching blue objects from SDSS with GALEX and the astrometric
catalogues USNO-B1.0, GSC2.3 and CMC14, 64 new dwarf nova candidates with one
or more observed outbursts have been identified. 14 of these systems are
confirmed as cataclysmic variables through existing and follow-up spectroscopy.
A study of the amplitude distribution and an estimate of the outburst frequency
of these new dwarf novae and those discovered by the Catalina Real-time
Transient Survey (CRTS) indicates that besides systems that are faint because
they are farther away, there also exists a population of intrinsically faint
dwarf novae with rare outbursts.

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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
20
The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph