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Fig. 18

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Same as Fig. 3 for Outer Ring attribute. As some outer rings can be of very low surface brightness, we preferentially show here galaxies with high-contrast rings. PGC0039859, PGC0047869 and PGC0045583 (3 right panels in the bottom row) are among the latest type galaxies (Sb) with values of the Outer Ring attribute between 0.5 and 1.

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