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   52006
   ASCA observations of the RS CVn binary Sigma CrB lasting two binary
   orbits (2.3 days elapsed time) are requested as part of a coordinated
   satellite and ground-based study of coronal structure, abundances, and
   flaring within this system. Simultaneous multiwavelength observations
   of flares and other coronal variability offer an extremely powerful
   technique to determine the physical processes controlling thermal and
   nonthermal coronal plasmas. We shall investigate the coronal temporal
   variability and model the quiescent and flaring plasma conditions.
   Flare elemental abundance variations will be quantified. Sigma CrB is
   the best target to study extreme coronal activity on solar-like dwarf
   stars.
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