1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2. UM-DAE Centre for Excellence in Basic Sciences, Vidyanagari, Mumbai 400098, India
3. Theoretical Physics IV: Plasma-Astroparticle Physics, Faculty for Physics & Astronomy, Ruhr University Bochum, 44780 Bochum, Germany
4. Ruhr Astroparticle And Plasma Physics Center (RAPP Center), Ruhr-Universität Bochum, 44780 Bochum, Germany
5. Astronomical Institute, Faculty for Physics & Astronomy, Ruhr University Bochum, 44780 Bochum, Germany
6. Konkoly Observatory, ELKH Research Centre for Astronomy and Earth Sciences, Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary
7. CSFK, MTA Centre of Excellence, Konkoly Thege Miklós út 15–17, H-1121 Budapest, Hungary
8. Department of Astrophysics/IMAPP, Radboud University Nijmegen, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands
9. Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russia
10. Moscow Institute of Physics and Technology, Dolgoprudny, Institutsky per., 9, 141700 Moscow, Russia
11. Department of Geodesy and Geoinformation, TU Wien, Wiedner Hauptstraße 8-10, 1040 Vienna, Austria
12. Instituto de Astrofísica de Canarias, Universidad de La Laguna, 38200 La Laguna, Spain
13. Departamento de Astrofísica, Universidad de La Laguna, 38206 La Laguna, Spain
14. Max Planck Institute for Physics, Föhringer Ring 6, 80805 München, Germany