1. Department of Astronomy and Physics, Saint Mary’s University, 923 Robie Street, Halifax, NS, B3H 3C3, Canada
2. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA
3. Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, V8P 1A1, Canada
4. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
5. Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Sternwartstr. 7, 96049 Bamberg, Germany
6. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA, United Kingdom