Multiwaveband Observations of Quasars with Flat Radio Spectra and Strong Millimeter Emission
S. D. Bloom, A. P. Marscher, E. M. Moore, W. K. Gear, H. Terasranta, E. Valtaoja, H. D. Aller, M. F. Aller
Abstract
We present multiwaveband observations of a well selected sample of 28 quasars and two radio galaxies with flat radio spectra and strong millimeter wave emission (referred to here as FSRQ's). The observations include multifrequency VLBI measurements, X-ray observations with ROSAT and submillimeter observations with the JCMT. Particularly interesting among many findings is a correlation between the X-ray to millimeter spectral index and fraction of flux density contained in the VLBI core. This tendency toward higher X-ray fluxes from sources with stronger jet emission implies that the knots in the jet are the prominent source of X-rays.
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