Tornikoski, M.Tingay, S.Muecke, A.Chen, A.Connaughton, V.Jauncey, D.Johnston-Hollitt, M.Kemp, J.King, E.McGee, P.Rantakyro, F.Rayner, D.Reimer, O.Tzioumis, A.2006-07-212006-07-211999The Astronomical Journal, 1999; 118(3):1161-11680004-6256http://hdl.handle.net/2440/12398During high radio frequency active galactic nucleus monitoring, we observed a major millimeter wave outburst from PKS 2255-282 in 1997 and initiated a campaign for multifrequency radio monitoring and VLBI imaging of the source. In 1998 January the EGRET instrument on board the Compton Gamma Ray Observatory detected a bright high-energy γ-ray outburst from its direction. Thus, we had the unique opportunity to monitor the source in detail at various radio frequencies already before the detection of the γ-ray outburst. We also initiated multiwavelength follow-up observations. In this paper we present multiwavelength data for PKS 2255-282 before and after the γ-ray outburst. Further, based on the observations, we estimate some physical parameters for this source and discuss the various emission mechanisms possibly involved during this outburst.en© 1999. The American Astronomical Societyquasars: generalquasars: individual (PKS 2255-282)Journal article0030004008001999151510.1086/30101900008291420000368014McGee, P. [0000-0002-9576-442X]