1. Commonwealth Science and Industrial Research Organization (CSIRO) Astronomy and Space Science, Australia Telescope National Facility, Post Office Box 76, Epping, New South Wales 1710, Australia.
2. International Centre for Radio Astronomy Research, Curtin University, Bentley, Western Australia 6102, Australia.
3. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Post Office Box 218, Hawthorn, Victoria 3122, Australia.
4. Astrophysics Group, Cavendish Laboratory, JJ Thomson Avenue, Cambridge CB3 0HE, UK.
5. Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University, Post Office Box 27, Victoria 3800, Australia.
6. Department of Electrical and Computer Engineering, University of California–San Diego, La Jolla, CA 92093, USA.
7. National Radio Astronomical Observatory, Array Operations Center, Post Office Box O, Socorro, NM 87801-0387, USA.
8. Department of Astronomy, School of Physics, Peking University, Beijing 100871, China.
9. Jodrell Bank Centre for Astrophysics, University of Manchester, Manchester M13 9PL, UK.
10. Department of Physics, Universitat Bielefeld, Universitatsstrasse 25, D-33615 Bielefeld, Germany.
11. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.
12. Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi, Xinjiang 830011, China.
13. School of Physics, University of Western Australia, Crawley, Western Australia 6009, Australia.
14. School of Physics, University of Melbourne, Parkville, Victoria 3010, Australia.