Padovani, PaoloPaoloPadovaniPerlman, EricEricPerlmanLandt, HermineHermineLandtGiommi, PaoloPaoloGiommiPerri, MatteoMatteoPerri2020-09-172020-09-172003-12-01https://hdl.handle.net/20.500.13025/185Chinese Journal of Astronomy & Astrophysics, Vol. 3, Supplement, p. 147-156We present the discovery of a new population of radio quasars. Unlike previously known sources, whose X-ray emission is due to (flat) inverse Compton radiation, these objects are characterized by (steep) synchrotron emission in the X-ray band, with a broad-band spectral energy distribution similar to that of BL Lacs with high energy synchrotron peaks. We discuss how this new class was discovered, the class properties, and the implications of its existence for our understanding of jet physics and active galactic nuclei in general.BL Lacertae objects generalgalaxies activequasars generalradiation mechanisms nonthermalradio continuum galaxiesX-rays galaxieshttp://adsabs.harvard.edu/abs/2003ChJAS...3..147P2003ChJAS...3..147P