ROSAT observations of the RSCVn binary σ Geminorum.

Details ROSAT observations of the RSCVn binary σ Geminorum. ROSAT observations of the RSCVn binary σ Geminorum.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...318..791y&link_type=abstract

Astronomy and Astrophysics, v.318, p.791-796

Astronomy and Astrophysics

Astrophysics

10

Stars: Coronae, X-Rays: Stars, Stars: Individual: {Sigma} Gem

Scientific paper

X-ray observations of the RSCVn system σ Geminorum have been undertaken with the ROSAT observatory. Several spectra of very good signal-to-noise ratio were obtained. Spectral fitting using metal abundances amounting to 50% of solar values reveal two temperature components at 2MK and 12MK. Previous EXOSAT observations showed another component at 40MK. Particular interest is focused on the temporal variations of the X-ray emission. It is found that variations occur on time scales ranging from years to hours and minutes.

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