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Fig. 2.

image

STOKES simulation of a type 1 quasar that suffers dimming of the continuum source by a factor of 10 in 5 years (indicated by the red vertical lines). Top: total flux in arbitrary units seen by the observer as a function of time. Middle: evolution of the polarization degree (p in percent). Bottom: evolution of the polarization position angle (Ψ in degrees).

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