| Affiliation: |
| AA(Columbia Astrophysics Laboratory, Columbia University, 550 W. 120th Street, New York, NY 10027; .; University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK), AB(Department of Physics and Center for Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139.; Department of Physics, Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8, Canada.; Alfred P. Sloan Research Fellow), AC(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK), AD(Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 1710, Australia), AE(Australia Telescope National Facility, CSIRO, P.O. Box 76, Epping, NSW 1710, Australia), AF(Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy.; Istituto di Radioastronomia del CNR, via Gobetti 101, 40129 Bologna, Italy), AG(University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK), AH(Department of Physics and Center for Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139) |