1. Centre for Astrophysics, University of Southern Queensland, USQ Toowoomba, QLD 4350, Australia
2. UNSW School of Physics, Sydney, NSW 2052, Australia
3. Department of Astronomy, Yale University, 52 Hillhouse Avenue, New Haven, CT 06511, USA
4. 51 Pegassi Fellow
5. Department of Physical Sciences, Kutztown University, Kutztown, PA 19530, USA