Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The new AM CVn star in Hydra   High speed photometry of the new AM CVn star in Hya (previously known as
SN2003aw), spectroscopically identified by Chornock & Filippenko, shows it to
have a superhump period of 2041.5 +/- 0.3 s. We find a range of brightness from
V ~ 16.5 to 20.3, presumably caused by variations in the rate of mass transfer.
In the intermediate state the system cycles in brightness with a period of ~ 16
h and range >= 0.4 mag. There are sidebands to the principal frequencies in the
Fourier transform which have constant frequency difference from the superhump
harmonics.

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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: nlin
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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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: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph