Correlation diagrams for the PDFs of the RMR model parameters of the WASP-76b transits. Ci and FWHMi indicate polynomial coefficients for the line shape properties (see text). Green and blue lines show the 1 and 2 simultaneous 2D confidence regions that contain, respectively, 39.3% and 86.5% of the accepted steps. 1D histograms correspond to the distributions projected on the space of each line parameter, with the green dashed lines limiting the 68.3% HDIs. The blue lines and squares show the median values.