The SEDs of 4C38.41 (z = 1.814; left) and 1Jy0537−286 (z = 3.104; right). Simultaneous data are shown in red; non-simultaneous literature or archival data are shown in light gray. Note that the UVOT data of these medium and high redshift objects matches quite well the QSO template of Vanden Berk et al. (2001) that we use to estimate the thermal emission from the blue bump (blue line). The emission from the host galaxy (orange line) is very low compared to other components. The observed X-ray emission from these sources is more than 3σ above the expected emission from accretion derived from Eq. (2). In both cases, the optical light is dominated by radiation from the accretion while the X-rays originate from the non-thermal component.
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