Lee, Sang-Sung

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

Author list: Sang-Sung Lee, Jun-Hyun Baek, Myoung-Hee Han, Do-Young Byun, Jee-Hye Yang, Bong Won Sohn

We introduce an on-going project for monitoring total flux density, linearly polarized flux, and polarization angle at 22, 43 and 86GHz of Gamma-ray bright AGN (Active Galactic Nuclei) with KVN (Korean VLBI Network) 21-m radio telescopes. The project has been conducted since May 2011 with an effective monitoring cycle of one week, observing four main objects (3C 454.3, BL Lac, 3C 273, and 3C 279). More objects were included in the source list when they had flared in gamma-ray. Especially, we included a compact radio source at the Galactic center, SgrA* since Jan. 2012. In this paper, we report the current status of the project and preliminary results for the monitoring observations.