Posterior of p(ε), ﹩{c}_{s}^{2}(n)﹩ and M(R) from the hierarchical model discussed in Section 4 with the correlation length taken from a uniform distribution σ/n ∈ [0.2, 0.4].  The dotted vertical lines and the associated bars correspond to the mean and 1σ credible intervals for densities reached in the centers of 1.4 M_⊙, 2 M_⊙, and M_TOV stars, while the contours in the lowest panel represent the 68% credible regions of the corresponding NICER observations.