Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Identification of SRGt 062340.2-265715 as a bright, strongly variable,
  novalike cataclysmic variable   We report the identification and follow-up of the transient SRG
062340.2-265715 detected with both instruments on board the
Spektrum-Roentgen-Gamma mission. Optical spectroscopy of the G=12.5 counterpart
firmly classifies the object as a novalike cataclysmic variable (CV) at a
distance of 495 pc. A highly significant TESS period of 3.941 hours,
tentatively identified with the orbital period of the binary, could not be
found when the object was reobserved with TESS two years later. The newer
high-cadence TESS data revealed quasi-periodic oscillations around 25 min,
while ground-based photometry indicated periodic variability at 32 min. Located
in very sparsely populated regions of color-magnitude diagrams involving X-ray
and optical magnitudes and colors, the new object could be an X-ray
underluminous magnetic CV, an intermediate polar, or an overluminous
nonmagnetic CV. The lack of uniquely identified spin and orbital periods
prevents a final classification. The site of X-ray production in the system,
L(X, bol) = 4.8 x 10^{32} erg/s, remains to be understood given its high
variability on long and short timescales.

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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: cs
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The categories of this paper are: alg-geom
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg