Comparisons of the NIR-normalised rest-frame SEDs between the PAH galaxies and the templates and models. The normalisation wavelength is indicated by a black solid vertical line in each panel. Top left: averaged observed SEDs in each redshift bin from Fig. 15. Top right: SWIRE SED templates of Sc (blue), M 82 (green), and NGC 6090 (red). Bottom left: SBURT SED models with (t_burst, Θ) = (400 Myr, 5.0), (200 Myr, 5.0), and (200 Myr, 2.0) in green, magenta, and blue, respectively. Bottom right: two-component composite SED (black) that combines the SWIRE E (13 Gyr old) SED template (red broken line) and a very young and compact SBURT SED model (70 Myr, 1.0; blue broken line). For the template and the model SEDs, the reconstructed SEDs from the synthetic catalogue are shown with small boxes at NIR–MIR wavelengths, whereas the full-resolution original SEDs are shown at OPT–NIR wavelengths.