1. Department of Theoretical Physics and Astrophysics, Masaryk University, Kotlářská 2, CZ-611 37 Brno, Czech Republic
2. MTA-Eötvös Loránd University Lendület Hot Universe Research Group, Pázmány Péter sétány 1/A, Budapest, 1117, Hungary
3. School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
4. Department of Astrophysical Sciences, Princeton University, 4 Ivy Lane, Princeton, NJ 08544-1001, USA
5. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
6. ICRAR, University of Western Australia, 35 Stirling Hwy, Crawley WA 6009, Australia
7. Department of Physics and Astronomy, University of Alabama in Huntsville, Huntsville, AL 35899, USA
8. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94305-4085, USA
9. Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305-4060, USA
10. SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA
11. SRON Netherlands Institute for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, The Netherlands
12. Leiden Observatory, Leiden University, PO Box 9513, NL-2300 RA Leiden, The Netherlands
13. ASTRON, Netherlands Institute for Radio Astronomy, PO Box 2, NL-7990 AA Dwingeloo, the Netherlands
14. The Observatories of the Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
15. Physics & Astronomy Department, Michigan State University, East Lansing, MI 48824-2320, USA