The Optical Emission from Gamma-ray Quasars
arXiv:astro-ph/0304405 · doi:10.1071/AS01123
Abstract
We present photometric observations of six radio-loud quasars that were detected by the COMPTEL gamma-ray telescope. The data encompasses seven wavebands in the optical and near-infrared. After correction for Galactic extinction, we find a wide range in optical slopes. Two sources are as blue as optically-selected quasars, and are likely to be dominated by the accretion disc emission, while three others show colours consistent with a red synchrotron component. We discuss the properties of the COMPTEL sample of quasars, as well as the implications our observations have for multi-wavelength modelling of gamma-ray quasars.
12 pages, 3 figures, accepted for publication in P.A.S.A; minor typos corrected
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