| Affiliation: | Mullard Space Science Laboratory, University College London, Dorking, Surrey RH5 6NT;Astrophysical Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD;Harvard-Smithsonian Centre for Astrophysics, Cambridge, MA 02138, USA;Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ;University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL;Institut d'Astrophysique de Paris, 98bis Boulevard Arago, 75014 Paris, France |
