1. Centre for Extragalactic Astronomy, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK
2. Department of Astrophysics/IMAPP, Radboud University , PO 9010, 6500 GL Nijmegen, The Netherlands
3. South African Astronomical Observatory , PO Box 9, Observatory, Cape Town 7935, South Africa
4. Department of Astronomy, University of Cape Town , Private Bag X3, Rondebosch 7701, South Africa
5. School of Physics and Astronomy, University of Southampton , Highfield, Southampton SO17 1BJ, UK
6. Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences , ul. Bartycka 18, 00-716 Warsaw, Poland
7. Institut d’Astrophysique de Paris, CNRS et Sorbonne Universites , UMR 7095, 98bis Boulevard Arago, 75014 Paris, France
8. INAF-Osservatorio Astronomico di Capodimonte , Salita Moiariello 16, I-80131 Naples, Italy
9. Instituto de Astronomia, Universidad Nacional Autonoma de Mexico , Ciudad de Mexico, CDMX 04510, Mexico
10. Department of Physics, University of the Free State , PO Box 339, Bloemfontein 9300, South Africa
11. Department of Applied Mathematics, University of Colorado , Boulder, CO 80309-0526, USA