Full SED of ULAS J1120+0641. All measurements with significance >1σ are plotted with error bars. Measurements below 1σ significance are plotted as upper limits (downwards arrows) at a value equal to 2σ (NB not measured flux+ 2σ). The mean quasar template for all SDSS quasars in Richards et al. (2006), fitted to the UKIRT and Spitzer points, is shown by the green line. The orange dashed line is a modified black body (β = 1.6 as used by Beelen et al. 2006 and defined in Sect. 3.3, T = 47 K) fitted to the 1.3 mm data point. The vertical grey line indicates the rest frame wavelength of Lyα emission. The solid magenta line in the EUV region 10^-3−0.12 μm is the power-law fit from Telfer et al. (2002) for radio-quiet quasars, α = −1.57 ± 0.17, with the uncertainty indicated by the dotted lines. The i′, z′ Subaru observations are not expected to match the intrinsic SED as the continuum is strongly absorbed at these wavelengths.