XLAF for two redshift intervals (z = 3 − 4, top panels; z = 4 − 6, bottom panels) and two hydrogen column density ranges (log N_H = 20 − 24, left panels; log N_H = 24 − 26, right panels). Black lines and grey shaded regions indicate the results for the parametric XLAF obtained from the X-ray-only posteriors, while red lines and shaded regions correspond to those derived using the IR luminosity priors. The corresponding binned XLAFs were derived using the Miyaji et al. (2001) method.