Affiliation: | School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT;Department of Physics and Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT;Universities Space Research Association/Laboratory for High Energy Astrophysics, GSFC, Greenbelt, MD 20771, USA;University of Iowa, Iowa City, IA 52245, USA;Départment de Physique, Universitéde Montréal, CP 6128, Succursale Centre-Ville, Montréal, Québec H3C 3J7, Canada;Institut d'Astrophysique &Géophysique, Universitéde Liège, 5 Avenue de Cointe, B-4000 Liège, Belgium |