Institution: | Astronomical Institute 'Anton Pannekoek' University of Amsterdam and Centre for High-Energy Astrophysics, Kruislaan 403, 1098 SJ, Amsterdam, the Netherlands;INAF–Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy;NASA Marshall Space Flight Center, SD50, Huntsville, AL 35812, USA;Universities Space Research Association/NSSTC, SD-50, Huntsville, AL 35805, USA;SRON, National Institute for Space Research, Sorbonnelaan 2, 3584 CA, Utrecht, the Netherlands;Center for Space Research and Department of Physics, Massachusetts Institute of Technology, 70 Vassar Street, Cambridge, MA 02139-4307, USA |