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   PR # 21181
      We propose observations around the edge of bright clusters of galax
    ies. The observations will give us correct baryon content in clusters
    and  its ratio to the gravitating mass. Since the radial distribution
    of galaxies is known to be significantly stepper than the hot gas    
    distribution, systematic drop in the metal abundance is expected     
    toward  the edge of the clusters if metals are indeed produced in    
    galaxies. Proposed targets are very bright and rich in emission      
    lines: best suited for the proposed research.                        
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