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Fig. 8.

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VVD diagram and correlation between photon index and outflow velocity () for fixed NH. The objects with zero velocity and zero AI of [O III λ5007] have been removed. Bottom: correlation of the photon index with outflow parameters for fixed NH for sources with photon counts larger than 10 (red-dot) and 50 (blue-dot). The best-fit lines for both samples are shown.

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