Invited Speakers Working groups Talks Program Proceedings Organisation Participants
Scientific rationale
A new era in high energy astrophysics has been recently opened with the launch of the  Fermi Gamma-Ray Space Telescope and the  AGILE satellite. Together with the latest generation of ground-based atmospheric imaging  Cherenkov telescopes these space missions are revolutionising studies of the high energy Universe. The first year results from the Fermi Large Area Telescope have confirmed the findings of EGRET, showing that the extragalactic gamma-ray sky is dominated by active galactic nuclei (AGN). At the other extreme of the spectrum, radio and millimetre-wave astronomy and especially VLBI have long been the key tools in studying the relativistic outflows that are the likely sites of gamma-ray production in AGN.
The potential synergies between high-resolution radio astronomy and gamma-ray observations of AGN were discussed in a workshop at the Goddard Space Flight Center in April 2007. After more than one year of Fermi science operations, it is now a good time to review what we have learned from the first combined radio and gamma-ray studies and to discuss how these first results should shape future research programs.
A workshop addressing these issues will be held at the Max-Planck-Institute for Radio Astronomy in Bonn, Germany on 21.6.-23.6.2010. Different topics will be addressed, such as the relationship of the radio properties to gamma-ray brightness, localisation of the high energy emission site, testing various gamma-ray production models, constraining the basic intrinsic jet properties, understanding the duty cycle of the flares etc. In addition to invited and contributed presentations, there will be three working groups formed by the workshop participants which will focus on particular aspects of the conference and outline multi-wavelength observing programs of the future.
The workshop is sponsored by the  RadioNet Consortium, within the  FP7 program of the European Union.
Invited Speakers
  • Marco Ajello
  • Margo Aller
  • Markus Böttcher
  • Teddy Cheung
  • Filippo D'Ammando
  • Justin Finke
  • Lars Fuhrmann
  • Philip Hardee
  • Svetlana Jorstad
  • Matthew Lister
  • Andrei Lobanov
  • Benoit Lott
  • Jeffrey Scargle
  • Working groups
    On Tuesday afternoon, June 22, there will be a splinter session, during which three working groups will discuss the following topics:
    WG1 Location of the gamma-ray emitting regions in blazars from the perspective of both observations and theory Chair: Matthias Kadler
    WG2 Multi-wavelength studies to determine the SEDs and probe the physics of the blazar zone in gamma-ray bright extragalactic radio sources Chair: Markus Boettcher
    WG3 Understanding the population properties of gamma-ray bright AGN. Identifying unassociated gamma-ray ray source. Chair: Teddy Cheung
    The goal of each working group is to identify the main theoretical questions regarding its topic, and to discuss observational programs designed to answer them. Each WG will present a summary of the discussions on the last day of the workshop.
    The participants are encouraged to sign up for one of the WGs during the meeting and contribute to the discussions.
    Session I: AGN in the gamma-ray and radio skies (Chair: M. Kadler)
      General properties of Fermi/LAT blazars Lott Benoit
      The gamma-ray blazar population Tosti Gino
      The radio-gamma-ray connection in AGNs in the era of Fermi/LAT Giroletti Marchello
      Identifying Fermi-LAT AGN using high-frequency radio surveys Mahony Elizabeth
    Session II: Blazar emission models (Chair: A. Readhead)
      Models for the spectral energy distributions and variability of blazars Böttcher Markus
      Combined synchrotron and non-linear synchrotron-self-Compton cooling of relativistic electrons Schlickeiser Reinhard
      Electromagnetic cascade in the vicinity of a supermassive black hole Vincent Stephane
      Radio-sub-mm flares from blazars in a discontinuous jet model Rachen Joerg
    Session III: Radio variability of gamma-ray AGN (Chair: M. Tornikoski)
      Probing the physics of gamma-ray blazars with single-dish monitoring data Aller Margo
      From EGRET to Fermi: mm-radio data and the origin of gamma-ray emission Valtaoja Esko
      The relation between the radio and gamma-ray emission in blazars from 15 GHz monitoring with the OVRO 40m Telescope and Fermi observations Max-Moerbeck Walter
      The F-GAMMA program: multi-wavelength AGN studies in the Fermi-GST era Angelakis Emmanouil
    Session IV: Multi-frequency studies I - Tools (Chair: G. Tosti)
      Cross-analyzing radio and gamma-ray time series data: Fermi marries Jansky Scargle Jeff
      Modeling AGN spectral energy distributions with leptonic models Finke Justin
      Localization of the gamma-ray emission site using multi-waveband data and mm-VLBI Jorstad Svetlana
    Session V: VLBI observations of gamma-ray AGN I (Chair: J. A. Zensus)
      Physical properties of blazar jets from VLBI observations Lobanov_Andrei
      Parsec-scale jet properties of Fermi-detected AGN Lister Matt
      Radio-gamma time delay in the cores of AGN Pushkarev Alexander
      VLBI ejections in gamma-ray bright AGN jets Kovalev Yuri
      Constraints on the gamma-ray emitting region in blazars from multi-frequency VLBI measurements Sokolovsky Kirill
    Session VI: VLBI observations of gamma-ray AGN II (Chair: K. Kellermann)
      Rapid variability of gamma-ray emission from sites near the 43 GHz cores of blazar jets Marscher Alan
      Radio flaring activity of 3C 345 and its connection to gamma-ray emission Schinzel Frank
      The TANAMI program Ojha Roopesh
      A new sample of faint blazars Mantovani Franco
      The jet in M87 from e-EVN observations Giovannnini Gabriele
    Session VII: Jet physics (Chair: E. Valtaoja)
      Observed radio and gamma-ray emission from simulated jets Blandford Roger
      M87 and the dynamics and microphysics inside the blazar zone Hardee Philip
      Resolving the Doppler-factor crisis in AGNs: non-steady magnetized outflows Lyutikov Maxim
    Session VIII: Multi-frequency studies II - Observations & Results (Chair: S. Vercellone)
      Recent multi-wavelength monitoring campaigns in the Fermi-GST era Fuhrmann Lars
      Monitoring of gamma-ray blazars with AGILE D'Ammando Filippo
      The boadband spectral energy distribution of the MOJAVE sample Chang ChinShin
      The unusual radio & gamma-ray properties of the quasar 4C+55.17 McConville William
    Session IX: Non-blazar gamma-ray AGN (Chair: E. Ros)
      Non-blazar gamma-ray AGN Cheung Teddy
      NGC 1275: then and now Kellermann Kenneth
      VLBI monitoring of 3C84 in a gamma-ray active phase Nagai Hiroshi
      Centaurus A as a cosmic ray accelerator Protheroe Ray
    Session X: Workshop summary (Chair: A. Marscher)
      Report from WG1 M. Kadler
      Report from WG2 M. Böttcher
      Report from WG3 C. Cheung
    The program can be downloaded as a pdf-file from
    The proceedings of the "Fermi meets Jansky" were published by the MPIfR. An electronic version of the proceedings will be made available through the ADS in the near future. Meanwhile the whole conference proceedings can be downloaded from here as a single pdf-file (14MB)

    Scientific organising committee
    Charles Dermer Naval Research Laboratory
    Matthias Kadler Universität Erlangen
    Alan Marscher Boston University
    Julie McEnery NASA
    Anthony Readhead Caltech
    Eduardo Ros University Valencia
    Tuomas Savolainen  (chair) MPI for Radio Astronomy
    Gino Tosti INFN, Perugia
    Esko Valtaoja University of Turku
    Stefano Vercellone INAF, Palermo
    Robert Wagner MPI for Physics
    Anton Zensus MPI for Radio Astronomy
    Local organising committee
    Christian Fromm  
    Beate Naunheim (secretary)
    Richard Porcas  
    Eduardo Ros (co-chair)
    Tuomas Savolainen (co-chair)
    Frank Schinzel  
    Hermann Sturm (web-page)
    Anton Zensus  

      The email address of the local organising committee is:   AGN2010