Zoom-ins of the CX Tau spectrum (black) from 9–16.5 µm, demonstrating the potential detection of OH prompt emission. The first two panels show close-ups of the 9–11 µm region, with a non-LTE DALI model from Tabone et al. (2024) (which includes both prompt emission due to photodissociation of H₂O and thermal excitation) shown in pink. The third panel shows the contributions of all slab models fit in the 13.5–17.5 µm region in gray (including OH). The DALI model is overlayed in pink. An artifact around 16.15 µm has been masked. The insets in this panel show close-ups of this model contrasted with the best-fit OH LTE slab model which is shown in blue. Lines belonging to the A′ symmetry are indicated with thick, solid pink arrows and lines belonging to the A'' symmetry are indicated with thin, dashed pink arrows.