| Institution: | Centre for Space Research and Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139-4037, USA;Max Planck;Institute for Astrophysics, Garching, Karl-Schwarzschild-Str. 1, Postfach 1317, D-85741, Garching, Germany Space Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, USA;Osservatorio di Brera, via Brera 28, Milano, I-20121, Italy;Instituto de Astrofisica de Canarias, 38200 La Laguna, Tenerife, Spain;University of Southampton, Southampton, SO17 1BJ;Cambridge University Institute of Astronomy, Madingley Road, Cambridge CB3 OHA;Astronomical Institute 'Anton Pannekoek', University of Amsterdam and Centre for High Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, the Netherlands |
