Demography of High-Redshift AGN

Table 2

Predicted number of faint, high-𝑧 X-ray sources.

Mission concept	PSF HPD	Mosaics	Total FOV	z = 4-5	z = 5–5.8	𝑧>5.8
	Arcsec		deg^2	𝐿X(𝑧=5)	𝐿X(𝑧=6)	𝐿X (𝑧=7)
Athena*	10	60×0.2 Msec	10	940>43.3	480>43.5	250>43.6
Athena*	5	6×2 Msec	1.0	360>42.5	210>42.6	125>42.8
Athena	5	40×0.3 Msec	7.0	1100>43	650>43.1	360>43.2
WFXT*	10	24×0.5 Msec	24	2300>43.2	1300>43.4	600>43.5
WFXT*	5	4×3 Msec	4	1200>42.5	700>42.6	400>42.8
WFXT	5	60×0.2 Msec	60	6000>43.35	3200>43.4	1600>43.5
Super-Chandra	2	6×2 Msec	0.6	310>42.2	185>42.3	110>42.5
Super-Chandra	2	24×0.5 Msec	2.4	390>43	220>43.1	125>43.2
Super-Chandra	1	2×6 Msec	0.2	175>41.8	100>42.0	65>42
Super-Chandra	1	6×2 Msec	0.6	350>42.1	210>42.2	120>42.4

*Close to confusion limit (40 beams per source).