Table 1: The hard X-ray sample.
Survey Solid angle $S_{\rm lim}$ $N_{\rm tot}$ $N_{\rm unid}$ $N_{\rm zph}$ $N_{\rm AGN1}$ $N_{\rm AGN2}$
  [deg2] [erg cm-2 s-1]          
HEAO1/Grossan 2658-22 000 (1.0-2.7) $\times$ 10-11 50 0 0 41 9
AMSS/ALSS $\sim $4.8-90.8 (0.11-2.1) $\times$ 10-12 139 1 0 88 37
HBSS 25.17 2.15 $\times$ 10-13 67 2 0 42 20
XMS 2.46-3.80 (3.30-9.36) $\times$ 10-14 144 13 0 111 25
CLASXS 0.4 1.3 $\times$ 10-14 112 19 0 67 41
HELLAS2XMM 0.21-0.90 (1.0-3.7) $\times$ 10-14 171 27 0 115 51
SEXSI 0.046-0.979 (0.51-5.72) $\times$ 10-14 252 40 0 151 90
LH/XMM 0.1056 5.1 $\times$ 10-15 64 4 11 40 20
CDF-S 0.012-0.0873 (0.44-1.49) $\times$ 10-15 239 4 66 80 131
CDF-N 0.0075-0.0873 (0.18-1.49) $\times$ 10-15 284 8 111 99 141
Total     1406 112 188 759 531


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