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- W1569149125 abstract "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." @default.
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- W1569149125 date "2004-09-20" @default.
- W1569149125 modified "2023-10-18" @default.
- W1569149125 title "Flare and quiescent X-ray emission from Sigma Geminorum" @default.
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