Perlman, E.E.PerlmanPadovani, P.P.PadovaniLandt, H.H.LandtGiommi, PaoloPaoloGiommiPerri, MatteoMatteoPerri2020-09-172020-09-172004-06-01https://hdl.handle.net/20.500.13025/200AGN Physics with the Sloan Digital Sky Survey, Proceedings of a conference held in Princeton, NJ, USA, 27-31 July 2003, Edited by Gordon T. Richards and Patrick B. Hall, ASP Conference Series, Volume 311. San Francisco Astronomical Society of the Pacific, 2004., p.365We use a large sample of blazars to provide new constraints on the spectral energy distributions and energetics of AGN jets. We have discovered a new population of X-ray loud flat-spectrum quasars, missed by previous radio surveys. The new class are the strong-lined counterparts to high-energy peaked BL Lacs, with UV/X-ray synchrotron peaks. Once these sources are included, we do not find agreement with the blazar sequence scenario. A more complete account of this work has recently appeared (Padovani et al. 2003).http://adsabs.harvard.edu/abs/2004ASPC..311..365P2004ASPC..311..365P