Results of the analysis on the f_X − f_UV relation. Different choices for the photon index Γ are on the x axis, while those for k δ_obs are shown as different colours. The squares represent the mean slope (top panel), intercept (mid panel) and dispersion (bottom panel) for all the redshift bins (Δlog(z)=0.06) with more than five objects after the chosen cuts in Γ and k δ_obs are applied. In black, we show the typical error on the estimates for the three quantities.