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Table 1.

Sample statistics.

CDF-S AEGIS-XD COSMOS
X-ray hard-band detected 326 574 1016
Stars removed 5 11 6
Totala 321 563 1010

XZ: have redshift information 20% 14% 6%
XZ: redshift constrained 23% 11% 3%
Have photoz 100% 53% 98%
Have specz 56% 17% 49%
Obscured (log NH ≥ 22 cm −2) 82% 34% 33%

Notes. Sources that have redshift information are those with 1 ≤ IG < 2 bits, while sources with constrained redshift are those with IG ≥ 2 bits.

(a)

Total number of sources selected.

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