*************************************************************************
   52007
   We propose to observe the eclipsing binary AR Lac with ASCA and EUVE
   simultaneously, to determine the temperature structure, abundances, and
   location and size of coronal emitting regions. Combined ASCA and EUVE
   spectroscopy uniquely provides complete coverage of temperatures from 1
   to 100 million K. Lightcurve analysis using the ASCA and the EUVE-DS
   will allow separation of the temperature dependence of variable
   features from the spectral dependence. An ASCA spectrum can establish
   the presence of a high energy ``tail'' in the DEM. We request one
   complete binary period, plus an optional request for coverage of a
   second cycle. Additional coverage will allow the first measure of cycle
   to cycle variability in the orbital lightcurve, and extend through the
   EUVE observations.
 *************************************************************************