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   53004
   We propose to use ASCA as a critical element in a comprehensive study
   of the energetics in the outer atmospheres of two extremely active RS
   CVn binary stars. ASCA will monitor the soft X-ray emission from the
   coronal plasma over part of the orbital periods; the information will
   be used to derive estimates of cooling losses, obtain specific
   information on flare heating, and infer the distribution and vertical
   structure of the emitting plasma layers. In parallel, we will perform a
   multiwavelength observing campaign with the NRAO VLBA and VLA radio
   telescopes; these will yield high-sensitivity spatially-resolved images
   of nonthermal coronal plasma components. We will study the interaction
   between thermal and nonthermal plasmas in quiescence and during flares.
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