Correlation diagrams for the PDFs of the RMR model parameters for the HD 3167c transit. C_i indicate polynomial coefficients for the contrast model (see text). Green and blue lines show the 1 and 2σ 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.