[1] Univ Cape Town, Dept Math & Appl Math, High Energy Phys Cosmol & Astrophys Theory HEPCAT, ZA-7700 Rondebosch, South Africa
[2] Univ KwaZulu Natal, Sch Chem & Phys, Astrophys & Cosmol Res Unit, ZA-4000 Durban, South Africa
[3] Univ KwaZulu Natal, NAOC UKZN Computat Astrophys Ctr NUCAC, ZA-4000 Durban, South Africa
[4] McGill Univ, Dept Phys, 3600 Univ St, Montreal, PQ H3A 2T8, Canada
[5] McGill Univ, McGill Space Inst, 3600 Univ St, Montreal, PQ H3A 2T8, Canada