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   PR # 42005
   We propose to observe the bright binary system Capella with ASCA and
   EUVE simultaneously, in order to determine the coronal temperature
   structure and abundances. While the previously obtained ASCA spectrum
   has been difficult to fit with any temperature model, including
   models derived from non-simultaneous EUVE observations, the situation
   can be ameliorated by using a simultaneous EUVE spectrum to determine
   the differential emission measure. Simultaneity is critical, as EUVE
   observations have shown variability by factors of 3 to 4 in the
   emission measures above ten million K. ASCA then provides a direct
   measurement of the relative Si, S, and Fe abundances, in addition to
   constraints on the highest temperature emission.Fits to the ASCA
   spectrum will provide other abundances as well.
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