1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.
2. Argelander Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany.
3. Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada.
4. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada.
5. Jodrell Bank Centre for Astrophysics, The University of Manchester, Alan Turing Building, Manchester M13 9PL, UK.
6. Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK.
7. Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Raumfahrtmanagement, Königswinterer Str. 522-524, 53227 Bonn, Germany.
8. ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA Dwingeloo, Netherlands.
9. Astronomical Institute Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands.
10. Astro Space Center of the Lebedev Physical Institute, Profsoyuznaya str. 84/32, Moscow 117997, Russia.
11. Department of Physics, University of Warwick, Coventry CV4 7AL, UK.
12. Department of Physics, West Virginia University, 111 White Hall, Morgantown, WV 26506, USA.
13. Department of Astronomy, University of Virginia, Post Office Box 400325, Charlottesville, VA 22904, USA.
14. National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA.
15. Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada.