1. Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester , Manchester M13 9PL , UK
2. LPC2E, Université d’Orléans, CNRS , 3A Avenue de la Recherche Scientifique, F-45071 Orléans , France
3. Centre for Space Research, North-West University , Potchefstroom 2531 , South Africa
4. Sydney Institute for Astronomy, School of Physics, The University of Sydney , NSW 2006 , Australia
5. ASTRO3D: ARC Centre of Excellence for All-sky Astrophysics in 3D , Canberra 2601, ACT , Australia
6. CSIRO, Space and Astronomy , PO Box 1130, Bentley, WA 6102 , Australia
7. ASTRON, the Netherlands Institute for Radio Astronomy , Oude Hoogeveensedijk 4, 7991 PD Dwingeloo , The Netherlands
8. Department of Physics, IISER Bhopal , Bhauri Bypass Road, 462066 Bhopal , India
9. Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn , Germany
10. South African Radio Astronomy Observatory , Black River Park, 2 Fir Street, Observatory, Cape Town, 7925 , South Africa
11. The Square Kilometre Array Observatory , Lower Withington, Macclesfield, Cheshire, SK11 9FT , UK
12. University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 , USA
13. Kavli Institute for the Physics and Mathematics of the Universe , 5-1-5 Kashiwanoha, 277-8583 Kashiwa , Japan