1. CSIRO Astronomy and Space Science, Australia Telescope National Facility, Box 76, Epping, NSW 1710, Australia
2. Sydney Institute for Astronomy, School of Physics, The University of Sydney, NSW 2006 Australia
3. Research Centre for Astronomy, Astrophysics, and Astrophotonics, Macquarie University, NSW 2109, Australia
4. Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St George Street, Toronto, ON M5S 3H4, Canada
5. Department of Astronomy, Yunnan University, and Key Laboratory of Astroparticle Physics of Yunnan Province, Kunming, 650091, China
6. Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, Hamburg D-21029, Germany
7. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia