Extended Data Fig. 6: Sensitivity to retrieval assumptions.

a, The Bayes evidence when fitting to the NIRCam data only. We allowed the mean eclipse depth to vary freely and applied a physically motivated lower bound on the temperature (1,700 K, corresponding to the equilibrium temperature with full heat redistribution and a high Bond albedo of 0.5). b, The Bayes evidence when fitting to the MIRI data only. c, The Bayes evidence when fitting to the full dataset (NIRCam + MIRI) with an independent parameterization of the temperature profile, in which the surface temperature and the atmospheric temperature (assumed to be isothermal) determine the emission spectra⁴⁶. d, The Bayes evidence when fitting to the full dataset excluding the two red-most binned MIRI data points (corresponding to the shadow region). e, The best-fit models when fitting to the full dataset excluding the two red-most binned MIRI data points. Coloured points show the model results binned to the same wavelength channels as the MIRI data.