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Fig. 6

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Variability estimator SV versus black hole mass for the Seyfert galaxies in the sample. Empty circles highlight AGN with predicted break time longer than 3 years, while blue empty squares point out the Seyferts from the SM13 sample. The arrow indicates the MBH upper limit for MR 2251178. Yellow triangles represent the average of the variability estimator in different black hole mass bins.

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