1. South African Astronomical Observatory, PO Box 9, Observatory, Cape Town 4735, South Africa
2. Nicolaus Copernicus Astronomical Center, Bartycka 18, PL-00-716 Warsaw, Poland
3. Department of Astronomy and Space Science, Ankara University, 06100 Tandogan, Ankara, Turkey
4. Department of Physics, University of Johannesburg, PO Box 524, Auckland Park, Johannesburg 2092, South Africa
5. Astrophysics Research Group, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, UK
6. Department of Physics & Space Science, Royal Military College of Canada, PO Box 17000, Station Forces, Kingston, ON K7K 7B4, Canada
7. Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
8. Center for Computational Astrophysics, Flatiron Institute, 162 5th Avenue, New York, NY 10010, USA
9. Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544, USA