1. Department of Physics and Astronomy, University of Southampton, SO17 1BJ, UK
2. Department of Physics & Astronomy, Wayne State University, 666 W Hancock St, Detroit, MI 48201, USA
3. Department of Physics and Astronomy, 4129 Frederick Reines Hall, University of California, Irvine, CA 92697-4575, USA
4. SUPA Physics and Astronomy, University of St Andrews, North Haugh KY16 9SS, UK
5. School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
6. Department of Physics, Western Michigan University, 1120 Everett Tower, Kalamazoo, MI 49008-5252, USA
7. Spectral Sciences Inc., 4 Fourth Avenue, Burlington, MA 01803, USA
8. Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA
9. Institute for Gravitation and the Cosmos, The Pennsylvania State University, University Park, PA 16802, USA
10. Department of Physics, 104 Davey Lab, The Pennsylvania State University, University Park, PA 16802, USA
11. Department of Astronomy, University of Maryland, College Park, MD 20742-2421, USA
12. Department of Physics, Indian Institute of Technology, Hyderabad 502285, India
13. Center for Cosmology and AstroParticle Physics, The Ohio State University, 192 West Woodruff Ave., Columbus, OH 43210, USA
14. Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547, USA
15. INAF – Istituto di Radioastronomia, Via P. Gobetti 101, I-40129 Bologna, Italy
16. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
17. South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa
18. Southern African Large Telescope Foundation, PO Box 9, Observatory 7935, Cape Town, South Africa
19. Centre for Extragalactic Astronomy, Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK
20. Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK