Marginalised posterior distributions of the best-fit cosmological parameters. The 1-σ and 2-σ confidence levels of the posteriors are shown as filled 2D contours. The model is explained in Sect. 3.1.2. The parameters are reported in Table 4. The left panel shows h-independent parameters: the physical cold dark matter density ω_c, the clustering amplitude σ₁₂, and the physical dark energy density ω_DE. The right panel shows the traditional inferred parameters: the matter density Ω_M, the amplitude σ₈ and the Hubble constant H₀. The constraints from the flux-limited eRASS1 sample are shown in blue, the CMB results from Planck Collaboration VI (2020) in orange.