Jul 12 – 23, 2021
Europe/Berlin timezone

TELAMON: Monitoring of AGN with the Effelsberg 100-m Telescope in the Context of Astroparticle Physics

Jul 12, 2021, 6:00 PM
1h 30m


Poster MM | Multi-Messenger Discussion


Matthias Kadler (JMU Wuerzburg)


We introduce the TELAMON program, which is using the Effelsberg 100-m telescope to monitor the radio spectra of active galactic nuclei (AGN) under scrutiny in astroparticle physics, namely TeV blazars and neutrino-associated AGN. Thanks to its large dish aperture and sensitive instrumentation, the Effelsberg telescope can yield superior radio data over other programs in the low flux-density regime down to several 10mJy. This is a particular strength in the case of TeV-emitting blazars, which are often comparatively faint radio sources of the high-synchrotron peaked type. We perform high-cadence high-frequency observations every 2-4 weeks at multiple frequencies up to 44GHz. This setup is well suited to trace dynamical processes in the compact parsec-scale jets of blazars related to high-energy flares or neutrino detections. Our sample currently covers about 40 sources and puts its focus on the high-peaked BL Lac objects and extreme blazars most frequently observed by TeV telescopes. Here, we introduce the TELAMON program characteristics and present first results obtained since fall 2020.


AGN; Blazars; AGN monitoring; Radio flux density measurements

Subcategory Experimental Results
Collaboration other (fill field below)
other Collaboration TELAMON

Primary author

Matthias Kadler (JMU Wuerzburg)


Dr Uwe Bach (MPIfR) Daniela Dorner (Universität Würzburg) Dr Phil Edwards (CSIRO) Mr Florian Eppel (JMU Würzburg) Dr Marcello Giroletti (INAF) Andrea Gokus Mr Jonas Heßdörfer (JMU Würzburg) Dr Shoko Koyama (ASIAA) Dr Alex Kraus (MPIfR) Dr Thomas Krichbaum (MPIfR) Dr Elina Lindfors (UTU) Prof. Karl Mannheim (Universität Würzburg) Dr Roopesh Ojha (NASA) Mr Georgios Filippos Paraschos (MPIfR) Mr Florian Rösch (JMU Würzburg) Prof. Eduardo Ros (MPIfR) Bernd Schleicher (University of Wuerzburg) Mr Jonas Sinapius (JMU Würzburg) Julian Sitarek (University of Lodz) Joern Wilms (ECAP & Remeis-Observatory, University of Erlangen-Nuremberg)

Presentation materials