Scatterplot matrix for the fit of the L_XXL-T relation of the XXL-100-GC sample. The posterior densities are shown along the diagonal; the 1σ, 2σ, and 3σ confidence contours for the pairs of parameters are shown in the upper right panels. The lower left panels show the Pearson’s correlation coefficient for the corresponding pair of parameters (text size is proportional to the correlation strength).