X-ray luminosity ([0.5−2] keV band) vs. Mass. Top panels: core-excised. Bottom panels: non-core excised. Left-hand panels: our (XUCS) sample. Right-hand panels: REXCESS sample. The solid (red) and dotted lines are the REXCESS Malmquist-bias corrected mean and estimated scatter. The solid blue line surronded by a yellow shading indicates our fit to our data. The shading indicates its 68% uncertainty and the dashed blue dashed lines indicate the fit model ± the intrinsic scatter.