1. Gemini Observatory, Northern Operations Center, 670 North A’ohoku Place, Hilo, HI 96720, USA
2. Departamento de Física y Astronomía, Universidad de Valparaíso, Av. Gran Bretaña 1111, Playa Ancha, Casilla 5030, Chile
3. Departamento de Astronomía, Universidad de Concepción, Casilla 160-C, Chile
4. Département de Physique, Université de Montréal, C. P. 6128, succ. centre-ville, Montréal (Qc) H3C 3J7 Centre de Recherche en Astrophysique du Québec, Canada
5. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
6. Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK
7. Department of Physics, Royal Military College of Canada, PO Box 17000, Stn Forces, Kingston, K7K 7B4, Canada
8. Ritter Observatory, Department of Physics and Astronomy, The University of Toledo, Toledo, OH 43606-3390, USA
9. Institute for Astronomy, University of Hawai‘i at Mānoa, Hilo, HI 96720-2700, USA
10. Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Ontario M5S 3H4, Canada
11. Division of Physics, MathematicsAstronomy, California Institute of Technology, Pasadena, CA 91125, USA
12. Université Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France