Analyses of the scaling relation between X-ray luminosity L_X and cluster masses M_obs from weak lensing on the data set from Mahdavi et al. (2013) (gray circles) and Giles et al. (2015) (filled red triangles). A direct power-law fit to the M13 sample is shown by the dashed black line. The best-fit slope B_LM^M13 is fixed in the analyses on the G15 sample. The dashed–dotted red line shows the direct fit to the G15 sample, whereas the solid red line represents the corrected fit including the mass bias. The correction for each individual cluster in G15 is shown with open red triangles.