CHEOPS images of HD 93963 FoV. Upper panel: An example of a CHEOPS subarray science image (from visit CH_PR110045_TG002001_V0200). Lower panel: DRP simulated FoV only with the background stars (therefore with the target removed), used to estimate the contamination level induced by these stars in the photometric aperture. Both panels: the orange circle represents the DEFAULT photometric aperture and the red numbered dots indicate the location of nearby stars. Due to the large difference in brightness, the background stars are barely detected in the CHEOPS science images.