Selected marginal distributions and covariances for models 1 (IMBH, left) and 10 (subcluster of unresolved objects, CUO, right), both for single main-sequence population and isotropic velocities. Only the elements of the MCMC chains past the burn-in phase are considered. The green curve shows the Gaussian prior, while its absence indicates flat priors in the provided range. The red arrows and crosses indicate maximum likelihoods. The contours are the equivalent of 1, 2, and 3σ. The two panels only show four out of eight (left) and five out of nine (right) of the free parameters.