Individual CHEOPS observations of four WASP-189 b occultations. In both panels, visits are shown chronologically from top to bottom, occurring on 19, 27, and 30 March and 7 April 2020, respectively. Left: uncorrected observations (black points) together with their full (baseline and occultation, red line) light-curve models. Blue vertical dash-dotted lines indicate the beginning and end of occultation. Right: data (black points) corrected for the instrumental and stellar trends, together with the occultation model (red line).