
%0 Journal Article
%A Whiting, M. T. 
%A Majewski, P. 
%A Webster, R. L. 
%T The Optical Emission from Gamma-Ray Quasars
%J Publications of the Astronomical Society of Australia
%D 2003/06/04
%V 20
%N 2
%P 196-202
%K galaxies: active &#8212; quasars: individual (PKS 0208&#8211;512, PKS 0506&#8211;612, PKS 0528+134, PKS 1622&#8211;297, PKS 2230+114, PKS 2251+158)
%R https://doi.org/10.1071/AS01123
%U https://www.publish.csiro.au/paper/AS01123 
%X We present photometric observations of six radio-loud quasars that were detected by the COMPTEL gamma-ray telescope. The data encompass 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 multiwavelength modelling of gamma-ray quasars. 
