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Fig. 4


Squared visibilities V2 (black) and rescaled differential squared visibilities (grey) at all three baselines for a small sample of successive frames (indicated by the frame index and the alternation of background colour) from dataset AT-MR-FT and at all wavelengths within each frame. Both quantities are superimposed for frames and baselines, where the visibility is close to , the estimated average squared visibility which is used to rescale ΔV2. The s marker on the abscissa axis indicates a frame included in the “best 20%” selection.

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