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   PR # 42179
   We propose observations of 4 bright Coma-like clusters, A2065, A2255,
   A2420 and A1650, whose X-ray images suggest that they are in a
   non-fully relaxed dynamical state. We expect to see significant X-ray
   temperature variations in these clusters, as predicted by several
   recent numerical simulations and, in fact, observed by ASCA in some
   nearby clusters. We will also measure the temperature at large
   off-center distances, where a sharp temperature decline is observed
   by ASCA in several other clusters. The gas temperature structure is a
   clue for the models of cluster formation and has important
   cosmological implications. The proposed clusters have redshifts
   between 0.07-0.085, and are sufficiently bright and small to fit
   within the useful ASCA FOV to facilitate these measurements.
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