EPJ Web of Conferences (Dec 2013)

Monitoring of multi-frequency polarization of gamma-ray bright AGNs

  • Lee Sang-Sung,
  • Han Myounghee,
  • Kang Sincheol,
  • Seen Jungmin,
  • Byun Do-Young,
  • Baek Jun-Hyun,
  • Kim Soon-Wook,
  • Kim Jeong-Sook

DOI
https://doi.org/10.1051/epjconf/20136107007
Journal volume & issue
Vol. 61
p. 07007

Abstract

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We started two observing programs with the Korean VLBI Network (KVN) monitoring changes in the flux density and polarization of relativistic jets in gamma-ray bright AGNs simultaneously at 22, 43, 86, 129 GHz. One is a single-dish weekly-observing program in dual polarization with KVN 21-m diameter radio telescopes beginning in 2011 May. The other is a VLBI monthly-observing program with the three-element VLBI network at an angular resolution range of 1.0–9.2 mas beginning in 2012 December. The monitoring observations aim to study correlation of variability in gamma-ray with that in radio flux density and polarization of relativistic jets when they flare up. These observations enable us to study the origin of the gamma-ray flares of AGNs.