Model pool (in gray) showing all SEDs, used to fit burst and post-burst epochs. The observed fluxes from both epochs are plotted in red (burst) and green (post-burst). They are well covered by the model SEDs (except for the burst data points at 163 and 186 μm, as discussed when introducing the model pool in Sect. 5.2.2). The dashed black line indicates the mean model, as obtained from the pre-burst fit alone. The NIR/MIR fluxes of that model have been used to set a lower limit to the post-burst, which was only observed in the red channel of FIFI (at λ ≥ 118 μm).