The first deep observations of an X-ray luminosity selected galaxy group sample

Our current understanding of the Xray properties of galaxy groups is limited bypoor quality data and an inhomogeneous and nonrepresentative coverage of themass function. We propose to make sufficiently deep observations of arepresentative Xray luminosity selected sample of 10 galaxy groups to detectthe emission out to virgul R_500 with similar accuracy to that available forobservations of nearby clusters. With these data we will investigate therelative importance of gravitational and nongravitational processes in settingthe observed Xray properties of group scale haloes, via extensive examinationof their structural and scaling properties. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]