1. Department of Physics; Department of Astronomy and Astrophysics; Center for Multimessenger Astrophysics, Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USA
2. Center for Neutrino Physics, Department of Physics , Virginia Tech, Blacksburg, VA 24061, USA
3. Kavli IPMU (WPI), UTIAS, The University of Tokyo , Kashiwa, Chiba 277-8583, Japan
4. Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University , Kyoto, Kyoto 606-8502, Japan