Watervapor model transmission spectra computed for the best-fitting p-T profile in Brogi et al. (2017) and an H₂O volume mixing ratio of 10⁻⁵. The model is shown at the same wavelengths of the data. The CARMENES line spread function for the NIR channel has been applied. The 1.0, 1.15 and 1.4 μm bands are shown in blue, green, and red, respectively. The orders in dark gray represent the a priori masks. The orders in light graywere masked a posteriori.