ROSAT X-ray observations of 3CRR radio sources

Over half the 3CRR sample of radio galaxies and quasars has been observed i n X-rays with ROSAT pointed observations, and we present results from these observations, discussing many of the sources in detail. The improved spati al resolution of ROSAT over earlier missions allows a better separation of the nuclear and extended components of the X-ray emission. We investigate t he relationship between nuclear X-ray and core radio luminosity, and show t hat our results support a model in which every radio galaxy and quasar has a beamed nuclear soft X-ray component directly related to the radio core. W e report evidence for rich cluster environments around several powerful qua sars. These X-ray environments are comparable to those of high-redshift rad io galaxies.