1. Department of Physics and Astronomy, University of Waterloo , Waterloo, ON N2L 3G1, Canada
2. Waterloo Centre for Astrophysics , Waterloo, ON N2L 3G1, Canada
3. LERMA, Observatoire de Paris, PSL Research Univ., College de France , CNRS, Sorbonne Univ., Paris, France
4. Centre for Extragalactic Astronomy, Durham University , DH1 3LE, UK
5. School of Physics & Astronomy, University of Nottingham , Nottingham, NG7 2RD, UK
6. Institute of Astronomy, Cambridge University , Madingley Rd., Cambridge, CB3 0HA, UK
7. Harvard-Smithsonian Center for Astrophysics , 60 Garden St., Cambridge, MA 02138, USA