Telluric correction for WASP-76 epoch 1. Top panel: CCF of H₂O over the telluric lines used in the fit, from an observed spectrum before (red) and after (blue) correction, and from its best-fit telluric spectrum (green). Middle panel: Average atmospheric pressures derived for H₂O over the epoch. Bottom panel: Spectrum of the exposure in the top panel, before (red) and after (blue) correction, with its best-fit telluric model (green).