Distribution of the NS posteriors of a coplanar inclined configuration of the GJ 581 system. The two-dimensional contours indicate 1-, 2-, and 3-σ confidence levels of the posterior distribution. The red crosses indicate the median of the posterior probability distribution. Top to bottom and left to right: mean orbital period P_pl, mean planetary eccentricities e_pl, planetary masses (in M_⊕), and the semi-major axes (in au).