1. INAF Istituto di Radioastronomia, Via Gobetti 101, 40129 Bologna, Italy
2. INAF Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius (CA), Italy
3. CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia
4. Department of Astrophysics/IMAPP, Radboud University Nijmegen, PO Box 9010, 6500 GL Nijmegen, the Netherlands
5. International Centre for Radio Astronomy Research, University of Western Australia, Crawley, WA 6009, Australia
6. SKA SA, 3rd Floor, The Park, Park Road, Pinelands 7405, South Africa
7. Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown 6140, South Africa
8. Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 George St, Toronto, ON M5S 3H4, Canada
9. Department of Physics & Astronomy, The University of Iowa, Iowa City, Iowa 52245, USA
10. Research School of Astronomy and Astrophysics, Australian National University, Canberra, Australia
11. Research Centre for Astronomy, Astrophysics, and Astrophotonics, Macquarie University, NSW 2109, Australia
12. Sydney Institute for Astronomy, School of Physics, The University of Sydney, NSW 2006, Australia
13. Bendenweg 51, 53121 Bonn, Germany
14. Department of Astronomy, Yunnan University, and Key Laboratory of Astroparticle Physics of Yunnan Province, Kunming 650091, China