[1] CEA IRFU CNRS Univ Paris Diderot, Lab AIM, CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France
[2] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany
[3] Clemson Univ, Kinard Lab Phys, Dept Phys & Astron, Clemson, SC 29634 USA
[4] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA
[5] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA
[6] Univ Calif Santa Cruz, Santa Cruz Inst Particle Phys, Dept Phys, Santa Cruz, CA 95064 USA
[7] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
[8] Stockholm Univ, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden
[9] Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden
[10] Oskar Klein Ctr Cosmoparticle Phys, AlbaNova, SE-10691 Stockholm, Sweden
[11] Univ Pisa, I-56127 Pisa, Italy
[12] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy
[13] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
[14] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy
[15] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
[16] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy
[17] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy
[18] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
[19] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy
[20] Univ Turin, Dipartimento Fis Gen Amadeo Avogadro, I-10125 Turin, Italy
[21] Univ Montpellier, Lab Univers & Particules Montpellier, CNRS IN2P3, F-34059 Montpellier, France
[22] Univ Johannesburg, Dept Phys, ZA-2006 Auckland Pk, South Africa
[23] Ecole Polytech, CNRS IN2P3, Lab Leprince Ringuet, Palaiseau, France
[24] Univ Washington, Dept Phys, Seattle, WA 98195 USA
[25] CIFS, I-10133 Turin, Italy
[26] Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00133 Rome, Italy
[27] George Mason Univ, Coll Sci, Fairfax, VA 22030 USA
[28] Naval Res Lab, Div Space Sci, Washington, DC 20375 USA
[29] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy
[30] INAF Osservatorio Astron Roma, I-00040 Rome, Italy
[31] Sonoma State Univ, Dept Phys & Astron, Rohnert Pk, CA 94928 USA
[32] Royal Swedish Acad Sci, SE-10405 Stockholm, Sweden
[33] INAF Ist Radioastron, I-40129 Bologna, Italy
[34] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy
[35] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy
[36] Ist Nazl Fis Nucl, Grp Collegato Udine, Sez Trieste, I-33100 Udine, Italy
[37] Stellar Solut Inc, Palo Alto, CA 94306 USA
[38] Univ Telemat Pegaso, I-80132 Naples, Italy
[39] Univ Udine, I-33100 Udine, Italy
[40] Univ Politecn Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy
[41] Univ Bordeaux 1, IN2P3 CNRS, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France
[42] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[43] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan
[44] Univ Orleans CNRS, Lab Phys & Chim Environm & Espace, F-45071 Orleans 02, France
[45] Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria
[46] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria
[47] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA
[48] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA
[49] CRESST, Greenbelt, MD 20771 USA
[50] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England