¹ LAL, Univ. Paris-Sud, IN2P3/CNRS, Orsay, France
² Institut d'Astrophysique de Paris, UMR 7095-CNRS, Université Pierre et Marie Curie, 98^bis boulevard Arago, 75014 Paris, France
³ Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Am Mühlenberg 1, D-14476 Golm bei Potsdam, Germany
⁴ Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA
⁵ Department of Physics and Astronomy, The University of Mississippi, University, MS 38677-1848, USA
⁶ Department of Physics, Montana State University, Bozeman, MT 59717, USA
⁷ Theoretical Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
⁸ Institute of Astronomy, University of Cambridge, Cambridge, CB30HA, UK
⁹ Department of Physics and Kavli Institute for Astrophysics and Space Research, MIT, Cambridge, MA 02139, USA
¹⁰ Raman Research Institute, Bangalore, 560 080, India
¹¹ Department of Physics and Astronomy, Northwestern Univ., Evanston, IL, USA
¹² APC (AstroParticules et Cosmologie), 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
¹³ School of Physics and Astronomy, Cardiff University, 5, The Parade, Cardiff, CF24 3YB, UK
¹⁴ Department of Physics, Indian Institute of Science, Bangalore, 560 012, India
¹⁵ Departament de Física, Universitat de les Illes Balears, Cra. Valldemossa Km. 7.5, E-07122 Palma de Mallorca, Spain
¹⁶ Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA