Results of the cosmological fit for the L20 quasar sample combined with Pantheon+ supernovae in a spatially flat ΛCDM with Ω_M and Ω_Λ free to vary. Orange contours: cosmological fit of quasars and supernovae considering fluxes, with γ and β free to vary. Violet contours: cosmological fit of quasars and supernovae considering luminosity distances, with γ and β fixed (i.e. γ = 0.61 and β = −31.16). A cross-calibration parameter K is also considered in both cases.