Left: WASP-43 b transit photometry (8 last TRAPPIST transits + the 3 Euler transits) used in this work, binned per 2 min, period-folded on the best-fit transit ephemeris deduced from our global MCMC analysis (see Sect. 3.3), and shifted along the y-axis for clarity. The best-fit baseline+transit models are superimposed on the light curves (red = TRAPPIST I + z filter; green = Euler Gunn-r′ filter). The third, ninth and tenth models (from the top) show some wiggles because of their position-dependent terms. Right: best-fit residuals for each light curve binned per interval of 2 min.