Fig. 2.
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Distributions of 6 μm luminosities (L6 μm, left panel) and radio loudness R150 (right panel), for all SDSS QSOs from the ALLQSO sample. The parent sample of red and control QSOs are shown as red and blue shaded areas, respectively, whereas the subsample of control QSOs matched in z and L6 μm to the red QSOs are shown by the dark blue unfilled histogram.
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