Fig. 1

Top panel: normalized TESS PDC-corrected photometry of WASP-121, with error bars, obtained over TESS orbits 21 and 22. Middle panel: median correction per orbital period of WASP-121b. Bottom panel: median-normalized PDC flux, after removing ramp-like systematics at the start of each TESS orbit (see text for details). We used this time series for the analysis.
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