Data and joint fit results of LHS 1478 with juliet (Sect. 3.2). Top (a): TESS photometry, with the black line representing the best transit-plus-GP fit. Middle (b): RV data from CARMENES and IRD, with the jitter term added to the uncertainties. The black line is the best fit Keplerian model. Bottom left (c): phased-folded TESS data, with the GP component removed. The black line is the best transit fit. The bottom sub-panel shows the residuals from the transit fit. Bottom right (d): phased-folded RV data. The black line is the best fit Keplerian model, and the red shaded area represents the 68% CI. Bottom sub-panel: residuals after removing the Keplerian fit.