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TANAMI (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) is a monitoring program to study the parsec-scale structures and dynamics of relativistic jets in active galactic nuclei (AGN) of the Southern Hemisphere…

TANAMI is a multiwavelength program monitoring active galactic nuclei (AGN) south of -30deg declination including high-resolution Very Long Baseline Interferometry (VLBI) imaging, radio, optical/UV, X-ray and gamma-ray studies. We have…

We introduce the TANAMI program (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) which is monitoring an initial sample of 43 extragalactic jets located south of -30 degrees declination at 8.4 GHz and 22 GHz since…

The Very Long Baseline Interferometry (VLBI) monitoring program TANAMI provides bi-monthly, dualfrequency (8GHz and 22GHz) observations of extragalactic jets with milliarcsecond resolution south of -30 deg declination using the Australian…

High Energy Astrophysical Phenomena · Physics 2012-05-08 Cornelia Müller , M. Böck , J. Wilms , M. Kadler , R. Ojha , J. Blanchard , M. Dutka , E. Ros

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…

The TANAMI (Tracking AGN with Austral Milliarcsecond Interferometry) program provides comprehensive VLBI monitoring of extragalactic gamma-ray sources south of declination -30 degrees. Operating at two radio frequencies (8 and 22 GHz), this…

Cosmology and Nongalactic Astrophysics · Physics 2010-06-11 Roopesh Ojha , Matthias Kadler , Moritz Boeck , Faith Hungwe , Cornelia Mueller , Joern Wilms , Eduardo Ros , the TANAMI Team

The Southern Hemisphere VLBI monitoring program TANAMI provides dual-frequency (8 GHz and 22 GHz), milliarcsecond monitoring of extragalactic jets south of -30 degrees declination. The TANAMI sample consists of a combined radio and…

High Energy Astrophysical Phenomena · Physics 2013-01-21 Cornelia Müller , F. Krauss , M. Kadler , J. Trüstedt , R. Ojha , E. Ros , J. Wilms , M. Böck , M. Dutka , B. Carpenter , the TANAMI collaboration

Extragalactic jets launched from the immediate vicinity of supermassive black holes in radio-loud active galactic nuclei (AGN) are key objects in modern astronomy and astroparticle physics. AGN jets carry a fraction of the total…

High Energy Astrophysical Phenomena · Physics 2019-08-13 M. Kadler , R. Ojha

The fine-scale structure and the kinematics of relativistic active galactic nuclei (AGN) jets have been studied by very-long-baseline interferometry at very high resolutions since 1998 at 2 cm wavelength for a sample of over a hundred radio…

Astrophysics · Physics 2014-11-18 Eduardo Ros

The TANAMI program has been monitoring the parsec-scale radio jets of southern gamma-ray bright AGN with VLBI techniques simultaneously with Fermi/LAT monitoring of their gamma-ray emission. Here we present the gamma-ray properties of the…

Cosmology and Nongalactic Astrophysics · Physics 2009-12-22 Moritz Boeck , Matthias Kadler , Gino Tosti , Toby Burnett , Roopesh Ojha , Cornelia Mueller , Joern Wilms

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…

High Energy Astrophysical Phenomena · Physics 2013-08-27 Felicia Krauß , Cornelia Müller , Matthias Kadler , Jörn Wilms , Moritz Böck , Roopesh Ojha , Eduardo Ros

With the emergence of very high energy astronomy (VHE; E>100 GeV), new open questions were presented to astronomers studying the multi-wavelength emission from blazars. Answers to these open questions, such as the Doppler crisis, and…

As a critical part of the Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry (TANAMI) program, in November 2007 the Australia Telescope Compact Array (ATCA) started monitoring the radio spectra of a sample of…

High Energy Astrophysical Phenomena · Physics 2012-05-14 J. Stevens , P. G. Edwards , R. Ojha , M. Kadler , F. Hungwe , M. Dutka , S. Tingay , J. P. Macquart , A. Moin , J. Lovell , J. Blanchard

Most extragalactic jets in radio-loud Active Galactic Nuclei are bright and variable gamma-ray sources, which are continuously monitored with Fermi/LAT. We present the gamma-ray properties of the MOJAVE and TANAMI AGN samples of radio-loud…

Cosmology and Nongalactic Astrophysics · Physics 2010-06-15 M. Boeck , M. Kadler , G. Tosti , T. H. Burnett , C. Mueller , R. Ojha , J. Wilms

At a distance of about 3.8 Mpc, the radio galaxy Centaurus A is the closest active galaxy. Therefore it is a key target for studying the innermost regions of active galactic nuclei (AGN). VLBI observations conducted within the framework of…

Astrophysics of Galaxies · Physics 2010-07-27 Cornelia Müller , M. Kadler , R. Ojha , M. Böck , C. M. Fromm , E. Ros , R. E. Rothschild , J. Wilms , TANAMI team

Extragalactic jets originating from the central supermassive black holes of active galaxies are powerful, highly relativistic plasma outflows, emitting light from the radio up to the gamma-ray regime. The details of their formation,…

High Energy Astrophysical Phenomena · Physics 2016-07-26 Cornelia Müller

Using high-resolution radio imaging with VLBI techniques, the TANAMI program has been observing the parsec-scale radio jets of southern (declination south of -30{\deg}) gamma-ray bright AGN simultaneously with Fermi/LAT monitoring of their…

Radio galaxies are relatively faint at $\gamma$-ray energies, where they make up only 1-2% of all AGN detected by Fermi-LAT. However, they offer a unique perspective to study the intrinsic properties of AGN jets. For this reason, the…

High Energy Astrophysical Phenomena · Physics 2019-08-14 Roberto Angioni , Florian Rösch , Eduardo Ros , Matthias Kadler , Roopesh Ojha , Cornelia Müller , Robert Schulz

Centaurus A is the closest active galactic nucleus. High resolution imaging using Very Long Baseline Interferometry (VLBI) enables us to study the spectral and kinematic behavior of the radio jet-counterjet system on sub-parsec scales,…

In the framework of the TANAMI multi-wavelength and VLBI monitoring, we study the evolution of the parsec-scale radio emission in radio galaxies in the southern hemisphere and their relationship to the $\gamma$-ray properties. In this first…

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