Presentation and distribution of the two extracted template spectra. Left column : AIB_Irrad map on top and the corresponding normalized template spectrum of the AIB_Irrad component. Middle column: same as left column, but for the AIB_Shieided template. We note that AIB_Irrad has a more prominent 3.3 μm band (and a slightly redder peak) than AIB_Shielded, which has a stronger 3.4 μm band. For a quick comparison between both templates, on each bottom panel, the complementary template is shown in dashed gray lines. Right column: composite image of both AIB_Irrad (red) and AIB_Shielded (blue) contributions. The ionization front (IF) and the dissociation fronts (DF1, 2, and 3) are represented by dashed white and orange lines, respectively (defined in Habart et al. 2024 and Peeters et al. 2024).