Institution: | Institute of Astronomy, Madingley Road, Cambridge CB3 0HA;Centre for Astrophysics Research, University of Hertfordshire, College Lane, Hatfield AL10 9AB;Lund Observatory, Box 43, SE 221 00 Lund, Sweden;Department of Physics, University of Warwick, Coventry CV4 7AL;Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA |