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   PR #   158
   Plerionic SNRs are known to be of uniform spectral indeces with
   $\sim$2. But the not well interpreted. The first aim is to deterime
   its index with high accuracy. ess. Someone consider that CTB80 is a
   product of supernova in 1404. And CTB80 is is estimated to be
   $\sim$10$^{5}$ yr. This discrepancy of the age of the two is n remnant
   is a thermal origin, we may obtain the temperature of it which can
   lead eriod, 35.9 ms. The short period pulsars are predicted to be
   strong $\gamma$-ray sts. The pulsation search is neede
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