Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flare and quiescent X-ray emission from Sigma Geminorum   The X-ray active RS CVn binary system Sigma Geminorum was observed during a
long-duration flare with XMM-Newton. We compare line emission during the flare
with line emission measured from a previous Chandra observation during
quiescence, in a model independent way. We find that in addition to an overall
25% flux increase, which can be ascribed to variations in the system's
quiescence activity over the 15 months that passed between the observations,
there is a hot plasma component of kT_e > 1 keV that arises with the flare. The
hot component is manifested primarily by high charge states of Fe and by a vast
continuum, but with no temperature or abundance effect on the cooler plasma,
except perhaps for Mg that is anomalously enhanced.

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The categories of this paper are: cs
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int