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Abstract We selected all radio-quiet active galactic nuclei (AGN) in the latest release of the Sloan Digital Sky Survey quasar catalogue, with redshift in the range 0.56–0.73. About 4000 (∼80 per cent) of these have been detected in all four infrared bands of Wide-field Infrared Survey Explorer (WISE). This is the largest sample suitable to study the disc-torus connection. We find that the torus reprocesses on average ∼1/3–1/2 of the accretion disc luminosity.
Calderone et al. (Fri,) studied this question.
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