Fig. C.1. The eleven line and band templates, normalized to unit peak intensity, used by the least square fitting code (first eleven panels; the 12th panel, labeled Sum, shows the combined template). The low three panels give examples of the fit goodness for three lines of sight (from left to right): towards Ori A; towards a "hot spot" in the H II  region; and towards a "hot spot" on the AIB emission. For all lines of sight the fit was stopped at 15 µm  since a simple parabola could not account for the steep rise at longer wavelengths.