Modeling results for the shock models (Aoyama et al. 2018), with the flux scaling corresponding to epoch 2022-10-14 – 06:52:50). On each row, the left panel shows the core component for that line (black line), a sample of the best fits (green lines) and the best fit (red line). Right panel: corresponding ${\chi }_r^2$ map. The models provide an increasingly good fit as the order of the line-transition increases. The shift between data and models for Hβ and Hγ is likely due to the lower accuracy on the reference wavelength for these two lines in NIST.