Relation between the core-excised X-ray luminosity L_Xc and mass estimated from the Y_X proxy, for the bolometric and soft-band luminosities of 118 systems. Left: data points with the best fitting relation to the X-ray-selected REXCESS sample with the evolution factor fixed to the self-similar value of n = −2 (grey envelope). The dark grey envelope shows the best fitting relation to the 37 SZE-selected systems at z < 0.3 with n = −2. Right: histogram of the log space residuals from the best fitting relation to the SZE-selected objects at z < 0.3.