Institution: | School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ;Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking RH5 6NT;Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany;Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA |