Posterior distributions of the two parameters log₁₀() and log₁₀() for the five images of observed data (blue to purple) and for the joint-PMC (black) described in Sect. 6.6. The 68%, 95%, and 99% contours of the joint-PMC are plotted in black, gray, and light gray, respectively, in the bottom left panel. The five individual 1D posteriors for each inset peak in the same region of parameter values, which indicates that the most likely parameters are consistent among the five images. The differences in the posteriors obtained from the different images come from the fact that the observed data come from different patches of the sky with statistically different amounts of information in the patches due to their independent environments. The joint posterior is tighter and shows how likely the parameters would be if we considered the five images simultaneously.