Star-formation and AGN contributions to the total IR luminosities L_IR(8 − 1000 μm). Left: our sample of galaxies at z ∼ 1.2, indicated by filled circles and color coded according to the AGN contribution to L_IR (f_AGN = L_IR,  AGN/L_IR). Blue circles show hard X-ray emitters with L_{2 − 10 keV} > 10⁴³ erg s⁻¹ detected by Chandra. The orange filled star marks the object from Brusa et al. (2018), which is part of our parent sample. The colored lines show the limits for f_AGN as labeled. Center, right: rest-frame far-IR SEDs normalized to L_IR(8 − 1000 μm) = 1 L_⊙ and color coded according to f_AGN (central panel) and X-ray detection (right panel). Gray diamonds and arrows show detections and 3σ upper limits on the photometry, respectively. We note that the emission at radio wavelengths is not included in the modeling.