1. National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa
4. Sydney Institute for Astronomy, School of Physics, University of Sydney, NSW 2006, Australia
5. ATNF, CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia
6. ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)
7. Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Rd., Oxford OX1 3RH, UK