092184

Giant radio galaxies (GRGs) whose lobes can extend to megaparsec scales arerarely seen in the centers of galaxy clusters but in these rich environmentsthey raise important questions for AGN feedback models. With most of the energyof the jets dissipated in lobes far outside the cool core do such systemsrepresent a failure mode of feedback? If not how do these sources maintain thethermal balance of the ICM? As only a handful of cluster-central GRGs havemodern X-ray data we propose XMM snapshot observations of 11 GRGs inoptically-identified brightest cluster galaxies to confirm the presence of ahot ICM ascertain its basic properties and establish its morphology and wherepossible determine the thermodynamic state of the cluster core. [truncated! Please see actual data for full text]