The Bulletin of The Korean Astronomical Society (천문학회보)

The Korean Astronomical Society (한국천문학회)
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Multifrequency monitoring of a flaring gamma-ray blazar 3C454.3 at 22 and 43GHz

  • Lee, Sang-Sung (Korean VLBI Network, Korea Astronomy and Space Science Institute) ;
  • Byun, Do-Young (Korean VLBI Network, Korea Astronomy and Space Science Institute) ;
  • Sohn, Bong-Won (Korean VLBI Network, Korea Astronomy and Space Science Institute)
  • Published : 2011.04.05
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Abstract

We report the results of the monitoring of a flaring gamma-ray blazar, 3C454.3 in total flux density at 22 and 43GHz and in polarization at 22GHz with KVN Ulsan 21-m radio telescope every 3-4 days from 19 November 2010 to 31 January 2011. After an extraordinary 5-day gamma-ray outburst in November 2010, the radio total flux density at 22/43GHz and the linear polarization at 22GHz has been decreased with a variation of a short time scale. In this paper, we also discuss a spectral change of 3C454.3 at 22 and 43GHz after the extraordinary gamma-ray outburst.

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