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   PR # 43040
   Distant massive clusters of galaxies are key objects for constraining
   cosmological scenarios. In this respect, we have selected 8 rich
   clusters from the ROSAT All-Sky-Survey and undertaken a
   multi-wavelength campaign which is to bring, for the first time, a
   unique data base of quality comparable to that reached for nearby
   objects. We have already performed high resolution optical and radio
   observations as well as deep ROSAT pointings; the sample will be
   extensively covered during the ISO central programme. We propose to
   measure the ICM temperature with ASCA, a fundamental parameter for
   characterizing, in close connection with the informations from the
   other WL, the dynamical state of these young objects. ASCA
   observations of the complete sample is an ESA/ISAS/NASA
   collaboration.
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