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   62086
   We propose a followup ASCA observation of the supernova remnant MSH15-
   56. MSH15-56 is the archetypical example of a ``composite'' SNR in the
   radio and has a complex, center-filled morphology in X-rays. Our
   previous observation shows that the central emission is mostly thermal
   in origin however, we detected a localized region of non-thermal X-ray
   emission near the shell of the remnant and NOT in the central region as
   anticipated. Unfortunately, our first observation could not cover the
   entire remnant. The proposed observation will complete the coverage of
   this important remnant by ASCA allowing us to extract the temperature
   and intensity profile for the entire remnant to compare with models for
   producing a center-filled morphology and to search for other regions
   with non-thermal emission.
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