Bayesian 3-dimensional analysis of the RM structure function for the model with Λ_max = 35 kpc. Top panel: the dots represent the data (error bars are comparable to the size of the symbols). The shaded area represents the population of synthetic RM structure functions from the posterior distribution. The dashed line corresponds to the most probable value for the model parameters (see text). Bottom panel: one-dimensional (histograms) and two-dimensional (colors and contours) marginalizations of the posterior for the model parameters. The contours are traced at 0.9, 0.75, and 0.5 of the peak value.