SED fittings for the 4 regions shown in Fig. 4 but fitted with a 4 Myr star cluster ISRF and Desert dust model. Light blue points: observed data with the errors, red squares: modelled broad-band fluxes, dashed-dot blue line: PAH emission, dashed-dot green line: VSG emission, dashed-dot red line: BG emission and dashed purple line: NIR continuum. The SED is well fitted at most bands except in the 6–9 μm wavelength range where the Desert dust model under-predicts the PAH emission.