PACS footprints of the blue camera ([O i] 63 μm) and the red camera ([O i] 145 μm and [C ii] 158 μm) overlaid on IRAC 8 μm, except for f) Mon R2. (There IRAC 8 μm is saturated, and the total intensity of AIB bands derived from fitting of IRS spectra (see text) is shown.) Green circles or boxes show the areas from which our PACS and IRS spectra are extracted (subregions in Table 3). For Mon R2 f), the positions of four IR sources (IRS1−4) and PDR 1 from Berné et al. (2009) are marked.