| Institution: | (1) Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, U.S.A.;(2) ESA Space Telescope Division, U.S.A.;(3) Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany;(4) ASI Science Data Center, c/o ESRIN, Via G. Galilei, 00044 Frascati, Italy;(5) Dipartimento di Fisica, Università la Sapienza, Piazzale A. Moro 2, Rome, Italy;(6) Present address: Joint Center for Astrophysics, University of Maryland, 1000 Hilltop Circle, Baltimore, MD, 21250, U.S.A. |
| Abstract: | We present a new population of radio quasars whose X-ray band, unlike previously known sources which have (flat) inverse Compton
radiation, is characterized by (steep) synchrotron emission, 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 jets and active galactic nuclei in general. |
