Best fit results from a joint transit and RV fit using a quasi-periodic GP model to account for the excess RV scatter in the RVs. a) NEID (yellow) and HPF (green) RVs as a function of time at the top. The best-fit Keplerian model is shown in red (appears as a solid band due to the short period orbit). The median of the GP component is shown in blue. The joint best-fit model is shown in grey. Residuals from the best fit model, shown at the bottom. b) Phase-folded RVs on the period of TOI-2431 b, shown at the top. Best-fit Keplerian model after subtracting the GP model is in red. RV residuals as a function of phase are shown at the bottom.