Fig. 3
Immediate vincinity of CoRoT-21 in the star field covered by LRa01. The outline is the aperture mask of the target star CoRoT-21. A potential perturber of the photometry is the star labeled “1” at the immediate edge of the outline. This star is not a CoRoT target. The contamination of the target mask is estimated to be 8.5%.
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