Fig. 4
Lag–luminosity relationship based on the data of Suganuma et al. (2006). The symbols for individual Seyfert 1 galaxies are the same as in Suganuma et al. (2006). The solid line is the best-fit regression from Suganuma et al. (2006). WPVS48 (red dot) lies close to the regression line. The dashed line indicates the dust sublimation radius rsub expected at a given nuclear luminosity MV (from Kishimoto et al. 2007).
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