Spectral energy distribution of the source labeled “bkg,” assuming a galaxy nature. The red dot corresponds to the photometry at 15μm, while the arrows are upper limits at 10μm and 11μm. The vertical lines denote the uncertainties, and the horizontal lines the W_eff of each filter. The gray lines are the galaxy models from Bruzual & Charlot (2003) at three different redshifts that better represent the actual data. The black dots are the synthetic photometry of each galaxy model.