1. SRON Netherlands Institute for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, the Netherlands
2. Anton Pannekoek Institute for Astronomy, University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, the Netherlands
3. National Centre for Radio Astrophysics, (NCFRA-TIFR), Post Bag 3, Ganeshkhind, Pune University Campus, Pune 411007, India
4. Janusz Gil Institute of Astronomy, University of Zielona Góra, Lubuska 2, PL-65-265 Zielona Góra, Poland
5. ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA Dwingeloo, the Netherlands
6. Physics Department, University of Vermont, Burlington, VT 05405, USA
7. Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK
8. Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS, PSL Research University, Univ. d’Orléans, F-18330 Nançay, France
9. LPC2E – Université d’Orléans, CNRS, F-45071 Orléans, France
10. SKA South Africa, The Park, Park Road, Pinelands 7405, South Africa
11. Department of Physics and Astronomy, University of the Western Cape, Private Bag X17, Bellville 7535, South Africa
12. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
13. Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
14. Mathematical Sciences, Physics and Astronomy and STAG Research Centre, University of Southampton, Southampton SO17 1BJ, UK
15. Department of Physics and Astronomy, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041, USA