1. Department of Physics, Mbarara University of Science and Technology, Mbarara, Uganda
2. Department of Physics, College of Science and Technology, University of Rwanda, Kigali, Rwanda
3. International Centre for Theoretical Physics-East, Africa Institute for Fundamental Research, Kigali, Rwanda
4. Rochester Institute of Technology, Rochester, NY, USA
5. Centre for Space Research, North-West University, Mahikeng 2745, South Africa
6. National Institute for Theoretical and Computational Sciences (NITheCS), Stellenbosch, South Africa