3C 326N IR spectral energy distribution fitted with the DustEm model. The blue points show the photometric data, composed of MIPS, PACS and SPIRE flux measurements (Table 2). The solid black line is the best fit DustEm model, and the dash and dotted lines show the model spectra for the two main dust grain populations used in the fit. The red squares show the photometric points computed from the model SED. Color corrections given by the instruments manuals have been applied to homogenize the different flux conventions between the instruments. The fitting routine and model SED points take the bandwidth and transmission filters of the different instruments into account (see text for details). The DustEm fit parameters used in this paper are G₀ = 9 ± 1 and a dust mass of M_dust = 1.1 × 10⁷ M_⊙.