Modeling of the RM + CLV effect on the transmission spectrum in the rest frame of the planet, specifically focused on the sodium detection presented in McCloat et al. (2021, A_D2 = 0.66%, σ_D2 = 0.06 Å, Δλ_D2 = +0.23 Å; A_D1 = 0.43%, and σ_D1 = 0.06 Å, Δλ_D1 = +0.23 Å). Top panel: Gaussian fit to the lines attributed by McCloat et al. (2021) to planetary sodium (their Fig. 4, blue) and simulated RM and CLV effects using EVE (red). We note that compared to McCloat et al. (2021), we use a reversed y-axis (due to different units used), that is absorption is above continuum and emission is below it. The 3σ and 5σ level reported by McCloat et al. (2021) is shown as dark blue dashed lines. Bottom panel: O–C values (UVES–EVE simulation, blue), and 3σ and 5σ UVES detection levels (blue).