Emission spectra for different atmospheric scenarios. The curves show the ratio of planetary to stellar flux in ppm as a function of wavelength in μm. In all cases, we considered a surface albedo of 0.1 and a heat redistribution factor based on Koll (2022) as colour-coded in the legend, ordered by the corresponding location of the model in the 15 μm bandpass. Only the no-atmosphere cases have an albedo of 0 and 0.1 and zero heat redistribution. The dashed grey line and the shaded area show the blackbody emission at 1024 K and in 1σ confidence intervals. The black dot shows the measured joint occultation depth with its 1σ uncertainty, and the pink diamond shows the measured value from the independent analysis using Frida. The blue curve and shaded light blue area at the bottom shows the response function of the F1500W filter.