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    PR # 32132                                                                   
     Kes 79 has been considered to be a composite SNR with a shell-like          
     radio morphology and center-filled X-ray emission, possibly due to          
     the evaporation of dense clouds in the SNR interior. However, recent        
     radio observation resolved the shell into double shells and the PSPC        
     observation identified most of emission is from inner shell. If the         
     inner shell emission is due to a reverse shock, the inner shell             
     emission should be hotter. However, spectral fitting and hardness map       
     using PSPC suggest the shell is slightly cooler than the diffuse            
     emission. We propose to use the SIS to perform spatially resolved           
     spectroscopy of Kes 79. The data will be used to map the temperature,       
     electron density and metal abundances, and examine the inner X-ray          
    emission, compared with other                                                
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