1. International Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102 , Australia
2. SKA Observatory , Jodrell Bank, Lower Withington, Macclesfield SK11 9FT , UK
3. ATNF, CSIRO, Space and Astronomy , PO Box 76, Epping, NSW 1710 Australia
4. Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064 , USA
5. Kavli Institute for the Physics and Mathematics of the Universe , 5-1-5 Kashiwanoha, Kashiwa 277-8583 , Japan
6. Division of Science, National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588 , Japan
7. Centre for Astrophysics and Supercomputing, Swinburne University of Technology , P.O. Box 218, Hawthorn, VIC 3122 , Australia
8. School of Mathematical and Physical Sciences, Macquarie University , NSW 2109 , Australia
9. Astrophysics and Space Technologies Research Centre, Macquarie University , Sydney, NSW 2109 , Australia
10. ARC Centre of Excellence for All-Sky Astrophysics in 3 Dimensions (ASTRO 3D) , Australia
11. Instituto de Física, Pontificia Universidad Católica de Valparaíso , Casilla 4059, Valparaíso , Chile