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   PR # 21533
    We propose ASCA investigations of three of the brightest clusters of 
    galaxies in the X-ray waveband. The selected clusters have similar X-
    ray luminosities (Lx=8-11 x10^44 erg s^-1)but otherwise exhibit quite
    different characteristics. Abell 3571 is individually the brightest  
    cluster in the Shapley Supercluster. Abell 1651 is a massive cooling 
    flow cluster & the only cluster from the brightest30 not to have been
    spectroscopically observed w/Einstein Observatory, EXOSAT or GINGA.  
    Abell 3667 is a strong candidate for a recent, massive subcluster    
    merger event and contains a complex radio halo structure. We propose 
    detailed investigations of thecooling flows (where present) in these 
    clusters & of the relationship between the flows & the observed temp-
   erature,metallicity and homoge
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