(Top left) Dust temperature (T_dust) map of NGC 6781 at resolution derived by fitting the PACS/SPIRE maps with a power-law dust emissivity, I_ν ∝ λ^{− β}B_ν(T_dust) in the same 300′′ × 300′′ field. The peak is 41.3 K, with contours indicating temperatures from 40 to 26 K at 2 K intervals (a linear color-scale wedge is also shown on the right). (Top right) T_dust contours overlaid with the (O iii) λ5007 map taken at the NOT (Phillips et al. 2011). (Bottom left) Power-law index (β) map with a linear color-scale wedge at the resolution. (Bottom right) Dust column mass density (ρ in M_⊙ pix^-1) map in log-scale at resolution. The peak is 1.3 × 10^-6 M_⊙ pix^-1.