1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
2. National Astronomical Observatories, Chinese Academy of Science, 20A Datun Road, Chaoyang District, Beijing 100012, China
3. National Radio Astronomy Observatory, P. O. Box 0, Socorro, NM 87801, USA
4. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr. Pasadena, CA 91109, USA
5. ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands
6. Department of Astrophysics/IMAPP, Radboud University, PO Box 9010, NL-6500 GL Nijmegen, the Netherlands
7. Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK
8. Institute of Astronomy / Battcock Centre for Astrophysics, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
9. Department of Physics, Lafayette College, Easton, PA 18042, USA
10. National Radio Astronomy Observatory, Charlottesville, VA 22903, USA
11. Department of Physics and Astronomy, 6224 Agricultural Road, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
12. Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
13. Center for Research and Exploration in Space Science and Technology and X-Ray Astrophysics Laboratory, NASA Goddard Space Flight Center, Code 662, Greenbelt, MD 20771, USA
14. Universities Space Research Association, Columbia, MD 21046, USA
15. INAF - ORA - Osservatorio Astronomico di Cagliari, via della Scienza 5, I-09047 Selargius (CA), Italy
16. Laboratoire de Physique et Chimie de l’Environnement et de l’Espace LPC2E CNRS-Université d’Orléans, F-45071 Orléans, France
17. Station de radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, F-18330 Nançay, France
18. Department of Physics, Hillsdale College, 33 E. College Street, Hillsdale, MI 49242, USA
19. Faculty of Science, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
20. Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada
21. Department of Nuclear Medicine, Vancouver Coastal Health Authority, Vancouver, BC V5Z 1M9, Canada
22. Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands
23. Department of Physics, Columbia University, 550 W. 120th St New York, NY 10027, USA
24. Department of Physics and Astronomy, West Virginia University, PO Box 6315, Morgantown, WV 26506, USA
25. LUTH, Observatoire de Paris, PSL Research University, CNRS, Université Paris Diderot, Sorbonne Paris Cité, F-92195 Meudon, France
26. Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, WV 26505, USA
27. Kavli institute for astronomy and astrophysics, Peking University, Beijing 100871, P.R. China
28. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn Vic 3122, Australia
29. Hungarian Academy of Sciences MTA-ELTE Extragalactic Astrophysics Research Group, Institute of Physics, Eötvös Loránd University, Pázmáany P. s. 1/A, Budapest 1117, Hungary
30. Center for Gravitation, Cosmology and Astrophysics, Department of Physics, University of Wisconsin-Milwaukee, PO Box 413, Milwaukee, WI 53201, USA