1. Astrophysics Research Institute, Liverpool John Moores University , IC2 Liverpool Science Park, Liverpool L3 5RF , UK
2. Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824 , USA
3. DARK, Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen , Denmark
4. Universidad Nacional Autónoma de México , Instituto de Astronomía, AP 106, Ensenada 22800, BC , México
5. Technological University of the Shannon , Athlone Campus, Co. Westmeath, N37HD68 Athlone , Ireland
6. Osservatorio Astronomico di Trieste , Vuz GB Trepolo 11, I-34131, Trieste , Italy
7. National University of Ireland, Galway to University of Galway , H91 TK33 Galway , Ireland
8. Steward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065 , USA