Intensity profile as a function of phase of the two wings at different epochs. Phase 0 corresponds to the near side of the semi-minor axis and negative values correspond to the SE wing. The dashed profile corresponds to a point-like source located at the expected position of CCc crossing the ring with the contrast upper limit given by Currie et al. (2015). The April 2016 data set was scaled by an arbitrary factor of 1.6 to overlap other profiles.
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