1. Departments of Physics and Astronomy, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041, USA
2. Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, UK
3. Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, UK
4. Haverford College,370 Lancaster Avenue, Haverford, PA 19041, USA
5. Department of Astronomy, University of Wisconsin-Madison, Madison, WI 53706, USA
6. South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa
7. Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
8. UCO/Lick Observatory, University of California, Santa Cruz, 1156 High St. Santa Cruz, CA 95064, USA
9. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
10. International Centre for Radio Astronomy Research, The University of Western Australia, 35 Stirling Hwy, 6009 Crawley, WA, Australia
11. ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Crawley, WAV, Australia
12. European Space Agency, ESTEC, Keplerlaan 1, NL 2201 AZ, Noordwijk, The Netherlands
13. Centro de Investigación en Astronomía, Universidad Bernardo O’Higgins, Avenida Viel 1497, Santiago, Chile
14. Oxford Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
15. School of Physics & Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
16. Department of Physics, Lancaster University, Bailrigg, Lancaster LA1 4YB, UK
17. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
18. Department of Physics and Astronomy, University of Kentucky, 505 Rose St., Lexington, KY 40506-0057, USA