1. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21218, USA
2. Center for Neutrino Physics, Department of Physics, Virginia Tech, Blacksburg, VA 24061, USA
3. SISSA – ISAS – International School for Advanced Studies, Via Bonomea 265, I-34136 Trieste, Italy
4. Dipartimento di Fisica e Astronomia Galileo Galilei, Università di Padova, Vicolo dell’Osservatorio 3, I-35122 Padova, Italy
5. Institute for Advanced Study, Princeton, NJ 08540, USA
6. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA
7. Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101, USA
8. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia