The marginalized and joint posterior PDFs of the model parameters from Model 1 of the observed RVs. Model 1 of the observed RVs models the two planets with Keplerian orbital solutions and the residual RV activity signal with a GP regression model trained on the K2 photometry in Fig. 1. Kernel density estimations of the trained posteriors are shown in the histograms of the logarithmic GP hyperparameters λ,Γ, and PGP (Cols. 2–4).
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