A Search for Synchrotron X-ray Emission From Radio Quasars

We propose to observe four radio quasars with unusually high Xray/radio coreflux ratios. Such high values point to a synchrotron origin of their Xrays andthis we wish to confirm. So far only lowpower blazars, the BL Lacs, were knownto have jets with synchrotron emission reaching energies as high as Xrays.Recently, synchrotron Xrays have been convincingly detected in one radioquasar, with suggestive evidence in four more. Establishing the existence of alarge population of such sources is vital for our understanding of jet physics.In particular it will challenge the blazar sequence.., a scenario whichadvocates that the frequency of the synchrotron emission peak in radio quasarsis lower than that in BL Lacs since the particles in their jets suffer more severe Compton cooling. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]