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    PR # 31256                                                                   
     Triple cluster system A2147, A2152 and A2152 forms a gravitationally        
     bounded  system. The prime aim of the observtio is to detect X-ray em       
     ission from hot  diffuse gaseous matter among the three clusters. We        
     deceide the form of  gravitational potential and distribution of dark       
      matter in the supercluster.  The system provide us a good chance to        
     study initial condition just before  cluster maergining. In the sence       
     , the system is one of the closest  supercluster from us. It enables        
     us to discuss fine structure of supercluster.                               
                                                                                 
                                                                                 
                                                                                 
                                                                                 
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