Searching for X-ray non-thermal emission in a radio-bright galaxy group

We propose a deep XMMNewton observation (210 ks including overheads) of MRC0116+111. This unique galaxy group is known to host a remarkably bright extendeddiffuse radio emission likely witnessing of a past extreme AGN feedbackepisode, along with a moderate Xray luminosity and gas temperature. Since itsradio/Xray flux ratio is among the highest ever reported for a diffuse source,it is an ideal target to search for nonthermal, inverseCompton (IC) Xrayemission. Assuming that the average group magnetic field is less than 10 microG,the proposed exposure will constrain the properties of the thermal gas glowingbelow 2 keV and detect significantly the nonthermal emission, which dominatesbeyond that energy. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]