Extended Data Fig. 1: Posterior model and data realizations for MIRI observations of K2-18 b.
From: Challenges in the detection of gases in exoplanet atmospheres
A Posterior data (gray) and model (orange) realizations generated from a flat-line model. Purple points indicate the median retrieved transit depth in each wavelength bin; vertical error bars represent the uncertainty in transit depth and horizontal bars indicate the bin width. B Residuals between the data realizations and the best-fit flat-line model. C As panel A, but for the model including a single-kernel Gaussian Process (GP) noise component. The GP identifies correlated structure near 7 μm and 8.5–9 μm, but this additional complexity is not statistically preferred over the flat-line model with white noise. D Residuals between the data realizations and the best-fit GP model.
