TANAMI: Milliarcsecond Resolution Observations of Extragalactic Gamma-ray Sources

Author/Creator ORCID

Date

2009-12-31

Department

Program

Citation of Original Publication

Roopesh Ojha, M. Kadler, M. Böck, R. Booth, M. S. Dutka, P. G. Edwards, A. L. Fey, L. Fuhrmann, R. A. Gaume, H. Hase, S. Horiuchi, D. L. Jauncey, K. J. Johnston, U. Katz, M. Lister, J. E. J. Lovell, C. Müller, C. Plötz, J. F. H. Quick, E. Ros, G. B. Taylor, D. J. Thompson, S. J. Tingay, G. Tosti, A. K. Tzioumis, J. Wilms, J. A. Zensus, TANAMI: Milliarcsecond Resolution Observations of Extragalactic Gamma-ray Sources, https://arxiv.org/abs/1001.0059

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Public Domain Mark 1.0
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law

Subjects

Abstract

The TANAMI (Tracking AGN with Austral Milliarcsecond Interferometry) and associated programs provide comprehensive radio monitoring of extragalactic gamma-ray sources south of declination -30 degrees. Joint quasi-simultaneous observations between the Fermi Gamma-ray Space Telescope and ground based observatories allow us to discriminate between competing theoretical blazar emission models. High resolution VLBI observations are the only way to spatially resolve the sub-parsec level emission regions where the high-energy radiation originates. The gap from radio to gamma-ray energies is spanned with near simultaneous data from the Swift satellite and ground based optical observatories. We present early results from the TANAMI program in the context of this panchromatic suite of observations.