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Fig. 15.
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Total fraction of obscured AGN with log NH > 22 vs. redshift observed in different X-ray samples of low-luminosity AGN (log LX ≈ 42.5; see text for details). Model curves are as in Fig. 14. The model with γ = 2 and θtorus = 45° (thick dashed blue line) provides a reasonable representation of the data.
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