1. Scientific Support Office, Directorate of Science and Robotic Exploration, European Space Research and Technology Centre (ESA/ESTEC), Keplerlaan 1, NL-2201 AZ Noordwijk, The Netherlands
2. Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, 7535 Bellville, Cape Town, South Africa
3. INAF – Instituto di Radioastronomia, via Gobetti 101, I-40129 Bologna, Italy
4. National Radio Astronomy Observatory, Charlottesville, VA 22903, USA
5. Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX, UK
6. Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa