Cumulative XLFs in the 2–10 keV energy band. Blue lines correspond to the XLFs without the contribution of SNRs, SSSs, ULX, and foreground stars, not corrected for incompleteness. Black lines are the XLFs corrected for incompleteness. Solid green lines are the AGN XLFs of Cappelluti et al. (2009), and dashed green lines are the 90% confidence errors. Solid red lines are the XLFs corrected for incompleteness and AGN-subtracted, and the dashed red lines are the resulting uncertainties.