Extended Data Fig. 3: Comparison of the treatment of the spot-crossing event.
From: Diversity in the haziness and chemistry of temperate sub-Neptunes
a. Example light-curve fit using the Gaussian spot model. The top panel shows the systematics-corrected light-curve for the 0.90-0.92 μm bin with the best-fitting transit model with (red) and without (dotted black) the Gaussian spot model. The bottom panel shows the residuals with the best fitting model. The data is binned per 16 second increments for visual clarity. b. White-light-curve fit using the spotrod model. The top panel shows the systematics-corrected white-light curve with the best-fitting model, including the modelled spot crossing event. The bottom panel shows the residuals of the fit. Again, the data is shown in 16 s bins for clarity. c. Graphical representation of the spot crossing event inferred from the spotrod fit shown in b. d. Transmission spectra obtained from both methods using the same R=50 spectroscopic bins. Because of a slightly different set of orbital parameters used in the Spotrod spectroscopic fit, it is offset by 50 ppm. Both spectra are fully consistent within their displayed 1σ error bars, and show no systematic discrepant trends.
