ROSAT OBSERVATIONS OF THE RSCVN BINARY SIGMA-GEMINORUM

X-ray observations of the RSCVn system sigma Geminorum have been under taken 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 2 MK and 12 MK. Previous EXOSAT observations showed another component at 40 MK. 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.