1. Centre for Astrophysics and Supercomputing, Swinburne University of Technology , Mail H30, PO Box 218, Hawthorn, VIC 3122, Australia
2. OzGrav: ARC Centre of Excellence for Gravitational Wave Discovery , Hawthorn, VIC 3122, Australia
3. SETI Institute , 189 Bernardo Avenue, Suite 200, Mountain View, CA 94043, USA
4. CSIRO, Astronomy and Space Science, Australia Telescope National Facility , PO Box 76, Epping, NSW 1710, Australia