| Institution: | Astronomy Division, PO Box 3000, FIN-90014 University of Oulu, Finland;Kazan State University, Astronomy Department, Kremlyovskaya 18, 420008 Kazan, Russia;Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, 85740 Garching, Germany;Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117810 Moscow, Russia;Centrum Astronomiczne im. M. Kopernika, Bartycka 18, 00-716 Warszawa, Poland;Laboratory for High-Energy Astrophysics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA |
