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Fig. 1


Derived extinction towards the hot dust AV vs. observed near-IR colour temperature. The intrinsic temperature T1 is set by the observed colour temperature of presumably unobscured sources (Seyfert 1.0–1.5) and the spread in these observed temperatures translates into an uncertainty of AV of about 3 mag as indicated for several observed colour temperatures. For details of the fit of the near-IR colour temperature we refer to B15, specifically Fig. 6 there.

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