Multiwavelength Observations of PKS 2255-282

Details Multiwavelength Observations of PKS 2255-282 Multiwavelength Observations of PKS 2255-282

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aj....118.1161t&link_type=abstract

The Astronomical Journal, Volume 118, Issue 3, pp. 1161-1168.

Astronomy and Astrophysics

Astronomy

13

Galaxies: Quasars: General, Quasars: Individual (Pks 2255-282)

Scientific paper

During 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 gamma-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 gamma-ray outburst. We also initiated multiwavelength follow-up observations. In this paper we present multiwavelength data for PKS 2255-282 before and after the gamma-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.

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