Multiwaveband Observations of Quasars with Flat Radio Spectra and Strong Millimeter Emission

Details Multiwaveband Observations of Quasars with Flat Radio Spectra and Strong Millimeter Emission Multiwaveband Observations of Quasars with Flat Radio Spectra and Strong Millimeter Emission

1998-12-04

arxiv.org/abs/astro-ph/9812089v1

Astronomy and Astrophysics

Astrophysics

38 pages, 17 figures, 12 tables, accepted for publication in Ap J Suppl, May 1999

Scientific paper

10.1086/313204

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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