| Affiliation: | University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire SK11 9DL;Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada;Australia Telescope National Facility (ATNF), Commonwealth Scientific and Industrial Research Organisation (CSIRO), PO Box 76, Epping, NSW 1710, Australia;INAF –Osservatorio Astronomico di Cagliari, Loc. Poggio dei Pini, Strada 54, 09012 Capoterra (CA), Italy;Universita' degli Studi di Cagliari, Dipartimento di Fisica, SP Monserrato-Sestu km 0,7, 90042 Monserrato (CA), Italy;Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027, USA |
