Fig. 10.

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Synthetic images using one snapshot of a SANE GRMHD model of a rotating reflecting surface with the absorption on and off and a black hole with the absorption off for two frequencies. The spin is a = 0.9375. The radius of the surface is R = 1.01 r+, where r+ is the radius an event horizon with the corresponding spin would have had. The inclination is i = 60°.
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