Fig. 7.
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2D plot of the BH spin axis precession period as a function of the spin parameter a and the accretion rate Ṁ for αvis = 0.1. The black dashed line corresponds to PBH = 10 years and the gray one to PBH = 1000 years. The area in between the vertical dotted white lines corresponds to the typical range of accretion rates for BL Lac objects.
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