1. Niels Bohr International Academy, Niels Bohr Institute , Blegdamsvej 17, DK-2100 Copenhagen, Denmark
2. Department of Physics, Institute of Astrophysics, FORTH, University of Crete , Voutes, University Campus, GR-71003 Heraklion, Greece
3. School of Physics and Astronomy, Monash University , Clayton, VIC 3800, Australia
4. The ARC Centre of Excellence for Gravitational Wave Discovery – OzGrav , Clayton, VIC 3800, Australia
5. Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USA
6. Department of Astronomy, University of Wisconsin-Madison , 475 North Charter St, Madison, WI 53703, USA