1. Center for Astrophysics | Harvard and Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
2. Instituto de Astrofísica de Canarias, E-38205 La Laguna, S/C de Tenerife, Spain
3. Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain
4. SRON, Netherlands Institute for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, the Netherlands
5. Department of Astrophysics/IMAPP, Radboud University, P.O. Box 9010, NL-6500 GL, Nijmegen, the Netherlands
6. Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland
7. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA
8. Department of Physics, University of Alberta, CCIS 4-183, Edmonton, AB, T6G 2E1, Canada
9. Department of Physics and Astronomy, Texas Tech University, Box 41051, Lubbock, TX 79409, USA
10. Gemini Observatory/NSF’s National Optical-Infrared Astronomy Research Laboratory, Casilla 603, La Serena, Chile
11. Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA