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   PR # 21160
     We propose emission-line mapping of the coolest cluster of galaxies 
    MKW4. Because of low temperature of ICM (kT=1keV), the suitable      
    angular size to SIS FOV (the diameter of 20arcmin), low redshift     
    (z=0.0196), many optical, radio and X-ray observation have done to   
    MKW4. At the such low temperature many emission lines from many atoms
    such as O,Ne,Mg,Si,S and Fe are expected in the X-ray spectrum. The  
    abundances, total masses, distributuions and the line temperature    
    contain so many and important information in the origine of heavy    
    metals in ICM and its fate. It also makes it clear when and how      
    galaxy was bone and has evolved until now.                           
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