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Fig. 13

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The fraction of flux of a contaminant that affects the photometry for aperture and PSF photometry as a function of separation. The width of the lines reflect the angular dependence due to the asymmetry of the CHEOPS PSF. R25 and R50 indicate the aperture radii expressed in pixels. The dashed vertical line at 16.8″ corresponds to the separation of the most significant potential contaminant.

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