﹩68.3 \% ﹩ and ﹩95.5 \% ﹩ credible regions for combinations of parameters within the Λ-GDM model for the PSS+Lens data set combination. Contours are shown for the following combinations: ﹩{\omega }_{g}﹩–c²_s (upper left); ﹩{\omega }_{g}﹩–﹩{c}_{\mathrm{vis}}^{2}﹩ (lower left); w–c²_s (upper right); w–﹩{c}_{\mathrm{vis}}^{2}﹩ (lower right). The lack of correlation shown in these plots indicates a clear split between the perturbative GDM parameters and background GDM parameters.