Institution: | Department of Physics and Astronomy, Cardiff University, PO Box 913, Cardiff CF24 3YB;Astrophysics Group, Department of Physics, University of Bristol, Tyndall Avenue, Bristol BS8 1TL;Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL;Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston, ACT 1611, Australia;Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 1710, Australia |