CCF values as a function of the orbital phase computed by cross-correlating the model containing only H₂O with the data of 23 June 2020 (left panel) and 15 April 2023 (right panel). The horizontal dashed lines represent the transit ingress and egress while the dash-dotted line represents the expected CCF peak trail due to the planetary motion, as measured in the observer rest frame. The expected CCF peak trail in transit is not represented for clarity. As shown, no telluric residuals are visible by eye at RV = 0 km s⁻¹ in both datasets. The white horizontal band in the left panel corresponds to a lack of out-of-transit spectra.