Extended Data Fig. 1: Raw broadband light curves for WASP-121b.
From: Diurnal variations in the stratosphere of the ultrahot giant exoplanet WASP-121b
WFC3 observations made in 2018 and 2019. Gaps in the time series are due to the target disappearing from view for approximately half of each HST orbit. Two secondary eclipses and the primary transit are visible by eye. The data are affected by detector systematics that result in a ramp-up of flux registered during each HST orbit. Guide star re-acquisitions were performed at the beginning of the 10th and 20th HST orbits for both observations.
