Fraction of z ∼ 1.2 obscured AGN with as a function of intrinsic 2–10 keV luminosity. The gold circles are the observed fraction, while the orange squares are the values obtained once corrected for the survey sky coverage. The second set of points is shifted by 0.05 on the log(L) axis for visual clarity. The solid magenta line represents the predictions from the Gilli et al. (2007) model for the intrinsic obscured fraction; the dashed purple line shows the prediction for the observed fraction accounting for the survey sky coverage. Left: obscured fraction derived using N_H > 10²² cm⁻² as the threshold (f₂₂). Right: obscured fraction derived using N_H > 10²³ cm⁻² as the threshold (f₂₃).