Multiwavelength observations of TANAMI sources

TL;DR

This paper presents initial multiwavelength observational results of TANAMI AGN sources, combining radio, X-ray, optical/UV, and gamma-ray data to analyze spectral energy distributions and variability.

Contribution

It introduces a comprehensive multiwavelength analysis of TANAMI sources, integrating VLBI, X-ray, optical/UV, and gamma-ray observations for the first time.

Findings

Correlations between radio, X-ray, and gamma-ray variability observed.

Spectral energy distributions show diverse features across sources.

Initial results highlight the importance of simultaneous multiwavelength data.

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.