Left and middle panel: retrieved T–P profiles (Guillot 2010) for the pre-eclipse (red), post-eclipse (blue) and pre+post (black) datasets under the free-retrieval and chemical equilibrium setups. The red, blue and grey shading marks the 1σ and 2σ recovered distribution computed from 10 000 samples from the MCMC for both regimes. Right panel: the atmospheric structure for the post-eclipse data from the best-fitting chemical model. The volume mixing ratio profiles for the continuum and detected species are shown as dashed lines (calculated using FASTCHEM), with the parametric T–P profile shown as a solid blue line.