| Institution: | Physics Department, Science Labs, South Road, Durham DH1 3LE; Department of Physics and Astronomy, Elliot Building, University of Victoria, Victoria, BC, Canada, V8P 1A1; Astronomy Department, University of Washington, Seattle WA, USA; Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA; II Universitádi Roma, Tor Vergata, Roma, Italy; Department of Physics and Astronomy, 517 Lederle Graduate Research Tower, University of Massachusetts, Amherst, MA 01003-4525, USA |
