Evolution of mean and width for several parameters. Left: confidence contours for the evolution of μ, with the results using the cluster fit positions shown as solid lines and the peak-centred cluster results shown as dashed lines. Right: confidence contours of the evolution of σ. The contours contain 39.3, 67.5, 86.4, and 95% of the MCMC samples. See Appendix C for corner plots of the other parameters.