Figure The graphs above display the fitting outcomes for complexes 1 and 2, using separate models, while the graphs below illustrate the fitting results using a global model. The focus of the current observation is how peak III in all four spectra is described, which is indicated by the dashed boxes. All peaks are placed at the same energy position on both spectra for complexes 1 and 2 in the bottom plots. Upon closer inspection of the spectra and corresponding fit, it is evident that the model fit still matches both spectra with high accuracy. However, comparing the residuals shows a decrease in precision in the region beyond the edge jump. It is crucial to note that the improvement in causality measured by BIC and AIC is significant. Adapted from Ref.