Maps of transmission spectra and residuals (smoothed) of the He I λ10833 region in the stellar reference frame. The top panel shows the observed transmission spectra and the bottom panel the residuals after subtraction of the best-fit model (color coded). The horizontal lines (black dashed) indicate the optical first to fourth contact times, dotted yellow lines (vertical) show the location of the telluric OH line components, the dash-dotted magenta line indicates the wavelength of the stellar He I λ10833 line, and the dashed red line (diagonal) shows the radial velocity track of the planetary orbit.