Example of the posterior distribution of the investigated parameters in the DE-MCMC analysis. The excess of absorption c [%], offset [%], peak position, and FWHM correspond to the parameters we used in the Gaussian fit, while the jitter term σ_j, the semi-amplitude of the correlated noise h, the correlation length λ were used to parametrise the SE kernel within the GP. The larger FWHM for GJ 3470 b is believed to be attributed to residuals from OH line contamination.