Fig. 2.
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Distribution of the soft X-ray photon index and absorbing column of the whole bright AGN sample of 601 sources. Upper panel: photon index distribution. The vertical dashed line indicates the boundary of Γ = 2.5 between the flat- and steep-spectrum sources. Lower panel: flat- and steep-spectrum sources (symbols are the same as in Fig. 1) in the photon-index–log NH plane.
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