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   72072
   We propose to continue our study of the smallest Galactic supernova
   remnants from the MOST radio catalog. Of the 20 smallest remnants in
   the MOST sample, 12 have been observed by ASCA already and at least six
   have been detected. We propose sensitive ASCA observations of the
   remaining 8 remnants. The sample includes both plerionic and shell-like
   SNRs that are likely to be heavily absorbed by the interstellar medium.
   The goal of the proposal is to find and study new examples of pulsar-
   powered synchrotron nebulae and young ejecta-dominated remnants and to
   study their properties. This proposal relies on the high energy imaging
   and spectroscopic capabilities of ASCA that allow us to observe at
   energies above 4 keV where the effects of ISM absorption are not
   important.
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