Planet-to-star radius ratio versus stellar rotation phase. The red and blue circles mark the TESS and CHEOPS transits, respectively, as modelled with pyaneti. (We note that the data points at phase 0° are repeated at phase 360° for clarity.) The solid error bars are the nominal uncertainty (precision), while the dotted lines are the uncertainties after accounting for the lack of accuracy with the bootstrap method described in Sect. 4.3.