[1
]Institute of Cosmology and Gravitation, University of Portsmouth, Burnaby Road, Portsmouth
PO1 3FX, UK
[2
]Departamento de Astronomía, Casilla 160-C, Universidad de Concepción, Concepción,
Chile
[3
]Institut Utinam, CNRS UMR6213, University Bourgogne Franche-Comté, OSU THETA, Observatoire
de Besançon, BP 1615, F-25010 Besançon Cedex, France
[4
]Department of Physics & Astronomy - Universidad de La Serena - Av. Juan Cisternas,
1200 North, La Serena, Chile
[5
]Chinese Academy of Sciences,National Astronomical Observatories of China, 20A Datun
Road, Chaoyang District, Beijing 100012, China
[6
]Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington,
KY 40506-0055, USA