1. Center for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824 , USA
2. Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences , Bartycka 18, PL 00-716 Warsaw , Poland
3. South African Astronomical Observatory , P.O. Box 9, 7935 Observatory , South Africa
4. Department of Astronomy, University of Cape Town , Private Bag X3, Rondebosch 7701 , South Africa
5. Department of Physics and Columbia Astrophysics Laboratory, Columbia University , New York, NY 10027 , USA
6. Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave, New York, NY 10010 , USA
7. UK Astronomy Technology Centre , Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ , UK
8. Carnegie Observatories , 813 Santa Barbara Street, Pasadena, CA 91101 , USA
9. DARK, Niels Bohr Institute, University of Copenhagen , Jagtvej 128, D-2200 Copenhagen Ø , Denmark
10. National Radio Astronomy Observatory , P.O. Box O, Socorro, NM 87801 , USA
11. INAF-Osservatorio Astronomico di Trieste , Via G.B. Tiepolo 11, I-34143 Trieste , Italy
12. Institute of Fundamental Physics of the Universe , Via Beirut 2, Miramare, 34151 Trieste , Italy
13. Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, PL-00-478 Warszawa , Poland
14. CRESST and X-ray Astrophysics Laboratory, NASA/GSFC , Greenbelt, MD 20771 , USA
15. Department of Physics, University of Maryland , Baltimore County, 1000 Hilltop Circle, Baltimore, MD 21250 , USA
16. INAF–Osservatorio di Padova , vicolo dell’Osservatorio 5, I-35122 Padova , Italy
17. Department of Astronomy, University of Wisconsin , 475 N. Charter St., Madison, WI 53704 , USA
18. Institute for Astronomy, University of Hawai’i , 2680 Woodlawn Drive, Honolulu, HI 96822 , USA
19. Department of Astronomy and Theoretical Astrophysics Center, University of California , Berkeley, CA 94720 , USA
20. Columbia Astrophysics Laboratory and Department of Physics, Columbia University , New York, NY 10027 , USA
21. Department of Astronomy, University of Illinois at Urbana-Champaign , 1002 W. Green Street, Urbana, IL 61801 , USA
22. Sternberg Astronomical Institute, Moscow State University , Universitetskii pr. 13, 119992 Moscow , Russia
23. Department of Astronomy & Astrophysics, University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 , USA
24. Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218 , USA