1. Department of Physics, Princeton University, Jadwin Hall, Princeton, New Jersey 08544, USA
2. Centre for Advanced Instrumentation (CfAI), Durham University, South Road, Durham DH1 3LE, United Kingdom
3. Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham DH1 3LE, United Kingdom
4. University of Toronto Institute for Aerospace Studies (UTIAS), 4925 Dufferin Street, Toronto, Ontario M3H 5T6, Canada
5. Department of Astronomy/Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721, USA
6. Institute of Theoretical Astrophysics, University of Oslo, Blindern, Oslo 0315, Norway
7. Department of Astronomy, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4, Canada
8. Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4, Canada
9. Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5R 2M8, Canada
10. Jet Propulsion Laboratory (JPL), California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
11. Institute for Computational Cosmology, Durham University, South Road, Durham DH1 3LE, United Kingdom
12. Department of Physics and Astronomy, The University of Sheffield, Hounsfield Road, Sheffield S3 7RH, United Kingdom