1. Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
2. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104-6396, USA
3. School of Earth and Space Exploration, Arizona State University, Tempe, AZ85287, USA
4. Cavendish Astrophysics, University of Cambridge, Cambridge CB3 0HE, UK
5. South African Radio Astronomy Observatory, Black River Park, 2 Fir Street, Observatory, Cape Town 7925, South Africa
6. Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
7. INAF-Istituto di Radioastronomia, via Gobetti 101, I-40129 Bologna, Italy
8. National Radio Astronomy Observatory, Charlottesville, VA 22903-2475, USA
9. Queen Mary University London, Mile End Road, London E1 4NS, UK
10. Department of Physics, Brown University, Providence, RI 02906, USA
11. National Radio Astronomy Observatory, Socorro, NM 87801, USA
12. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
13. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547, USA
14. School of Physics, University of Melbourne, Parkville, VIC 3010, Australia
15. Department of Physics, University of Washington, Seattle, WA 98105, USA
16. eScience Institute, University of Washington, Seattle, WA 98195, USA
17. School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Private Bag X54001, Durban, South Africa
18. Department of Physics and McGill Space Institute, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada
19. School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, Durban 4000, South Africa
20. Scuola Normale Superiore, I-56126 Pisa, PI, Italy
21. Department of Physics and Astronomy, University of Western Cape, Cape Town 7535, South Africa
22. Center for Astrophysics, Harvard & Smithsonian, Cambridge, MA 02138, USA
23. American Astronomical Society, Washington, DC 20006, USA