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   72074
   We have come up with a sample of Galactic supernova remnants that we
   propose to survey with ASCA. The selected remnants all show soft X-ray
   emission according to ROSAT. We present evidence that our sample
   includes pulsar-powered synchrotron nebulae, young ejecta-dominated
   remnants, and middle-aged adiabatic phase remnants. ASCA's broadband
   spectral and imaging capabilities will enable us to clearly identify
   the nature of these sources and study them in detail.
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