Transmission spectra of KIC 9164561B calculated with different noise models (Top panel: GP-M32 model. Middle panel: GP-SHO model. Bottom panel: sinusoidal baseline model) and different common-mode removal methods (direct-fit: blue circles; divide-white: green squares; divide-rescaled: red diamonds). The solid lines and shaded areas are the best-fit polynomial trends with the strongest Bayesian evidence and their 1σ credible intervals, respectively. The black lines are the broadband radius ratio from the Kepler data. The data points are slightly shifted along the wavelength for clarity.