CHEOPS photometry of TOI-2141 analysed using pycheops (see text). The transits of planet c were observed in five separate visits. Top panels show the normalised raw CHEOPS light curve (sky blue), the binned raw light curve (dark blue), and the best fitted GP+transit model (brown line). Bottom panel shows the detrended light curves (sky blue), the binned, detrended light curve and the best-fitted transit model (green).