Example of an image with high Earth’s stray light contamination (visit ID: CH_PR300059_TG001201). Note the inhomogeneous background going from 3815 to 4400 ADUs. In cases like this, the background correction done by the DRP does not work properly. We recommend ignoring these images during the light curve analysis. The Earth’s stray light contamination is a periodic function of the orbit, depending on the time and pointing. A simulation of stray light variation (normalised) during one orbit is given on the right.