1. Department of Mathematics and Physics, Thomas More College, 333 Thomas More Parkway, Crestview Hills, KY 41017, USA
2. Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, USA
3. Astrophysics Group, Computational Engineering and Science Research Centre, University of Southern Queensland, Toowoomba, Queensland 4350, Australia
4. Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA