Observed median IR SEDs of massive QGs. The magenta circles mark the observed photometry, with arrows indicating 3σ upper limits for bands where the measured flux density was negative. We note that the radio points at 10 and 20 cm were not included in the modelling. The black line and the grey shaded areas indicate the best-fit model from the Draine & Li (2007) templates and the associated uncertainty. The dashed orange line is the best fit adopting a single T_d modified black body. The left, middle, and right panels show the results for the redshift intervals 0.3 < z < 0.65, 0.65 < z < 1.0, and 1.0 < z < 1.4, respectively. Salient properties of the sample are reported in Table 1.