a–q parameter cross-section for J150822. Boxes indicate points sampled (other parameters are optimized) and the global minimum is marked with a cross. Contour lines show the 1, 2, 3, 4, and 5σ uncertainty levels derived from the Δχ² values of the sampled points. Points outside the plot boundaries or the dotted lines were not sampled since they corresponded to physically implausible masses for the stellar components (<0.08 or >1.5 M_⊙).