Multiwavelength observations of TANAMI sources

Abstract

The TANAMI VLBI program is monitoring a sample of 84 Active Galactic Nuclei of the Southern Sky at 8.4 and 22 GHz. The combination of VLBI and multiwavelength data allows us to study changes in the spectral energy distributions, as well as changes in the structure of the inner jets and to search correlations between both. We present initial results of the multiwavelength analysis of a sub-sample of the TANAMI sources, combining our radio data with simultaneous X-ray and optical/UV observations from Swift and XMM-Newton, and gamma-ray data from Fermi, focusing on the broadband spectral energy distributions as well as variability in different wavebands.