Observations of a representative 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 deep observations of a representative, Xrayluminosity selected sample of 9 galaxy groups drawn from a complete fluxlimitedcatalogue. We will measure the temperature out to R_500 with similar accuracy tothat available for high quality observations of nearby clusters (e.g., REXCESS).We will investigate the relative importance of gravitational andnongravitational processes in setting the observed Xray properties of groupscale haloes, via extensive examination of their structural and scalingproperties. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]