Off the diagonal: 2D marginalized likelihood distributions (see text), for the model grid fitting results on fitting five first and six second overtone bandheads for B275. On the diagonal: the 1D probability distribution functions (PDF) for each parameter resulting from normalizing the marginalized likelihood distributions to the area under the plotted line. The meaning of the mean, max, and conf values is explained in the text. The patterns in the 2D distributions give insight into the degeneracies between parameters.