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   PR # 11159
    A part of distant clusters of galaxies with Z > 0.5 show that a frac-
    tion of galaxies with Seyfert I activity is very largeup to 50 % from
    the results of optical/IR observations.  Since there is a very small
    number of distant clusters observed in X-rays so far, we propose ASCA
    observation of one of such  clusters; Cl 132229+30274 with z = 0.76.
    This observation will reveal AGN activity associated with cluster of
    galaxies and give important information for a interpretation of type
    of sources, of which cosmic X-ray background consists.




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