Best fit against Benneke et al. (2019) dataset with transit spectra in which the spectral contributions of selected species has been removed. Blue: H₂ O contribution of the transit spectrum displayed in Fig. 3, with an offset of the 10⁵ -Pa level of +98 km. Cyan: H₂O, CO, CO₂, and NH₃ total contribution of the transit spectrum displayed in Fig. 3, with an offset of the 10⁵ -Pa level of + 57 km. Black: K2, HST and Spitzer from Benneke et al. (2019). The dotted red line is our best-fit spectrum with all absorptions (see Sect. 4). The χ² of these spectra against the data is indicated in parentheses.