1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany
2. Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany
3. ASTRON, the Netherlands Institute for Radio Astronomy, Oude Hoogeveensedijk 4, NL-7991 PD, Dwingeloo, the Netherlands
4. Department of Astrophysics/IMAPP, Radboud University, PO Box 9010, NL-6500 GL Nijmegen, the Netherlands
5. Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, D-14473 Potsdam, Germany
6. Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
7. Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK
8. Indian Institute of Astrophysics, 2nd Block, Koramangala, Bangalore 560034, India
9. Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Straße 1, D-85748 Garching b. München, Germany
10. Fakultät für Physik und Astronomie, Astronomisches Institut, D-44780 Bochum, Germany
11. LPC2E - Université d’Orléans / CNRS, F-45071 Orléans cedex 2, France
12. Station de Radioastronomie de Nançay, Observatoire de Paris, PSL Research University, CNRS, Univ. Orléans, OSUC, F-18330 Nançay, France
13. Thüringer Landessternwarte, Sternwarte 5, D-07778 Tautenburg, Germany
14. South African Radio Astronomy Observatory, 2 Fir Street, Black River Park, Observatory, Cape Town 7925, South Africa
15. Department of Physics and Astronomy, University of the Western Cape, Cape Town 7535, South Africa