Institution: | (1) Theory Department, CERN, Ch-1211 Geneve 23, Switzerland;(2) INTEGRAL Science Data Center, 1290 Versoix, Switzerland and Geneva Observatory, CH-1290 Sauveray, Switzerland;(3) Institut des Hautes études Scientifiques, Bures-sur-Yvette, F-91440, France;(4) école Polytechnique Fédérale de Lausanne, Institute of Theoretical Physics, FSB/ITP/LPPC, BSP 720, CH-1015 Lausanne, Switzerland |