1. Department of Physics and Astronomy, Bartol Research Institute, University of Delaware , 104 The Green, Newark, DE 19716, USA
2. Groupe d’Astrophysique des Hautes Energies, STAR, Université de Liège, Quartier Agora (B5c, Institut d’Astrophysique et de Géophysique) , Allée du 6 Août 19c, B-4000 Sart Tilman, Liège, Belgium
3. CRESST and X-ray Astrophysics Laboratory, NASA/Goddard Space Flight Center, Code 662 , Greenbelt, MD 20771, USA
4. Institute for Astrophysics and Computational Sciences, The Catholic University of America , 620 Michigan Avenue , N.E. Washington, DC 20064, USA
5. Department of Physics and Astronomy, Swarthmore College , 500 College Ave, Swarthmore, PA 19081, USA
6. Department of Physics, Engineering Physics & Astronomy, Queen’s University , 99 University Ave, Kingston, ON K7L 3N6, Canada
7. Department of Physics and Space Science, Royal Military College of Canada , 13 General Crerar Crescent, Kingston, ON K7K 7B4, Canada
8. National Radio Astronomy Observatory , 520 Edgemont Road , Charlottesville VA 22903, USA
9. Department of Physics and Astronomy, Howard University , 2355 6th St NW, Washington, DC 20059, USA
10. X-ray Astrophysics Laboratory, NASA/GSFC , 8800 Greenbelt Road, Greenbelt, MD 20771, USA
11. LESIA, Paris Observatory, PSL University, CNRS, Sorbonne University, Université Paris Cité , 5 place Jules Janssen, 92195 Meudon, France
12. American Association of Variable Star Observers , 185 Alewife Brook Pkwy , Cambridge, MA 02138, USA
13. Department of Theoretical Physics and Astrophysics, Masaryk University , Kotlářská 2 , 611 37 Brno, Czechia
14. Penn State Scranton , 120 Ridge View Drive , Dunmore, PA 18512, USA