| Affiliation: | Astrophysics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW;Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia;Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD;Department of Physics, University of Durham, South Road, Durham DH1 3LE;Department of Physics, Oxford University, 1 Keble Road, Oxford OX1 3RH;Theoretical Physics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW |
