Correlation between the measured line intensities and the synthetic images of the MIRI filters. Top from left to right: H₂ 6.9 μm and F770W, [Ar II] 6.99 μm and F770W, HI 6–5 and F770W, and H₂ 8.0 μm and F770W. Bottom from left to right: [Ar III] 8.99 μm and F770W, H₂ 9.7 μm and F1000W, HI 9–7 and F1130W, and [Ne III] 15.5 μm and F1500W. We do not include the [S IV] 10.5 μm here due to the unsolved artifacts likely due to spurious jump detections in the ramps. Colors indicate the distance from the ionization front as in Fig. 4. Red marks indicate the data points of the five template spectra.