Fig. 30
The log N(> S) − log S curve of XGPS sources in the hard band. Error bars represent the one sigma counting statistics. At faint fluxes, the 90% confidence region of the log N(> S) − log S curve of Ebisawa et al. (2001) is shown in magenta. The dash-dotted blue curve represents the expected extragalactic contribution assuming a mean NH of 9.0 × 1022 cm-2. Thin line: after Campana et al. (2001). Thick line: after Mateos et al. (2008).
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