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   81303
   The long-look observations of ASCA in AO-8 provide an unique
   opportunity to observe a dwarf nova continuously throughout its
   outburst cycle. Such an observation has never before been made.
   Previous monitoring observations have suffered from sparse coverage and
   the results have always been ambiguous. By observing the system YZ Cnc,
   which has very frequent outbursts, we will obtain the first X-ray
   lightcurve with similar quality to the optical lightcurves we have
   enjoyed for decades. Just as these optical observations have driven the
   development of the disk instability model, we fully expect the ASCA
   long-look to drive the development of models of the inner accretion
   disk and boundary layer.
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