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Fig. 3.

image

Zoom in to a saturated star in detector 05. Top panel: heatmap of the ADU counts, while the bottom panel is an horizontal cut through the center of the star. In cases like this very bright star the fault is evident and often leads to artifacts around it, but for stars moderately within the nonlinearity and saturation regimes, the central dip is much more subtle and cannot be filtered out simply.

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