1. Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn, Germany
2. CSIRO Astronomy and Space Science, Australia Telescope National Facility , PO Box 76, Epping NSW 1710, Australia
3. Department of Astrophysics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
4. Department of Physics and Electronics, Rhodes University , PO Box 94, Grahamstown 6140, South Africa
5. Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester , Manchester M13 9PL, UK
6. Centre for Astrophysics and Supercomputing, Swinburne University of Technology , P.O. Box 218, Hawthorn, Victoria 3122, Australia
7. Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav)
8. Magdalen College, University of Oxford , Oxford OX1 4AU, UK
9. Department of Astronomy & Astrophysics, Pennsylvania State University , 525 Davey Lab, University Park, PA 16802, USA