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Fig. 9


Optical/NIR colorcolor diagram of the 33 quasars from the parent sample, color-coded as a function of their reddening, AV (see the top legend). The HAQ gr color cut is shown by the dashed line. This conservative cut yields a reliable sample of reddened quasars only, while more relaxed color criteria are needed to obtain a more complete sample of reddened quasars, see also Fig. 5 (middle and right panel).

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