******************************************************                         
    PR # 31257                                                                   
     We propose ASCA observations of three clusters of galaxies which are        
     targets for the Sunyaev-Zeldovich (SZ) effect: Abell~1895, MS0906.5+1       
     110, and MS0735.6+7421. ASCA data will allow us to study the temperat       
     ure and density profiles of these clusters. This will be essential to       
      interpret SZ decrement radio data to be obtained from the Ryle teles       
     cope and derive an unbiased value for the Hubble constant.                  
                                                                                 
                                                                                 
                                                                                 
                                                                                 
                                                                                 
                                                                                 
  ******************************************************