¹ Cahill Center for Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
² Astronomy and Astrophysics, Eberly College of Science, The Pennsylvania State University, University Park, PA 16802, USA
³ Carnegie Institution for Science, 813 Santa Barbara Street, Pasadena, CA 91101, USA
⁴ Benoziyo Center for Astrophysics, Faculty of Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
⁵ IPMU, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa-shi, Chiba, Japan
⁶ Department of Astronomy, University of California, Berkeley, CA 94720-3411, USA
⁷ Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, NL-7990 AA Dwingeloo, The Netherlands
⁸ Kapteyn Astronomical Institute, University of Groningen, Postbus 800, NL-9700 AA Groningen, The Netherlands
⁹ Center for Gravitation and Cosmology, University of Wisconsin, Milwaukee, WI 53211, USA
¹⁰ Universities Space Research Association, NSSTC, Huntsville, AL 35805, USA
¹¹ Space Science Office, VP-62, NASA-Marshall Space Flight Center, Huntsville, AL 35805, USA
¹² Department of Physics (Astrophysics), University of Oxford, Keble Road, Oxford OX1 3RH, UK
¹³ Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117, USA
¹⁴ Department of Physics, University of California Santa Barbara, Santa Barbara, CA 93106, USA
¹⁵ Computational Cosmology Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA
¹⁶ NASA-Goddard Space Flight Center, Greenbelt, MD 20771, USA
¹⁷ Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario M5S 3H4, Canada
¹⁸ School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978, Israel
¹⁹ Department of Astrophysics, American Museum of Natural History Central Park West & 79th Street, New York, NY 10024, USA