XMM-ATLAS log N–log S in the 2–10 keV band. Filled circles: fluxes from the spectral fits are used whenever possible; catalogue fluxes are used otherwise. Open circles: only fluxes from the catalogue are used; a small horizontal shift has been introduced in the plot to better distinguish the error bars. The solid line shows the best fit to the filled data points. The dashed line is the best-fit model from Georgakakis et al. (2008). The error bars show the 1σ uncertainty.