******************************************************
   PR # 41151
   In AO1 and AO3 observations of distant (z~0.5), powerful radio
   galaxies, from all of them, ASCA detected thermal X-ray emission from
   the clusters of galaxies surrounding them. Now we can complete our
   work if less-powerful at 5GHz, isolated radio galaxies, 3C275 and
   3C306.1 are observed. Our statistical study of them will clearify the
   relation between the powerful radio galaxies and their surrounding
   clusters, and between the galaxies and the radio-laud QSOs. All of
   the results are very useful for the study of cosmological evolution
   of these objects.
  ******************************************************