Effect of the offset between X-ray and optical centres on the X-ray luminosity vs. richness scaling relation for the SCGF Gaussian subsample. The parameters of the scaling relations for the non-Gaussian sample are shown in dashed black lines, small offset clusters – in solid blue lines and large offset clusters – in dash-dotted magenta lines. The separation is done at 0.3 R_200c. Other details are the same as in Fig. 12.