Broad-band observed SEDs for sources SDSS J085111.59+142337.7 (left) and SDSS J105320.42–001649.7 (right), as examples of sources classified as a blazar and a non blazar, respectively. In all panels, the thin solid lines are SDSS spectra, purple points, and upper limits are from allWISE, the red filled points are from GROND (Sbarrato et al. 2013b), and green points show archival data (Space Science Data Center). Red empty data points are instead the new X-ray data from this work. The models include a thermal emission from the disk, jet, and corona (dashed black line), a synchrotron component (green lines) and an external Compton component at higher energies. The different models in each panel differ mainly by their viewing angle, which mainly affect the high energy section (different colours, as labelled). The parameters for all the solutions are detailed in Table 2.