1. Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
2. Birmingham Institute for Gravitational Wave Astronomy and School of Physics and Astronomy, University of Birmingham , Birmingham B15 2TT, UK
3. Centre for Extragalactic Astronomy, Department of Physics, University of Durham , South Road, Durham, DH1 3LE, UK
4. Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , 2200, Denmark
5. Tuorla Observatory, Department of Physics and Astronomy, University of Turku , FI-20014 Turku, Finland
6. School of Sciences, European University Cyprus , Diogenes Street, Engomi, 1516 Nicosia, Cyprus
7. The School of Physics and Astronomy, Tel Aviv University , Tel Aviv 69978, Israel
8. CIFAR Azrieli Global Scholars program , CIFAR, Toronto, ON M5G 1M1, Canada
9. DTU Space, National Space Institute, Technical University of Denmark , Elektrovej 327, 2800, Kgs. Lyngby, Denmark
10. Astronomical Observatory, University of Warsaw , Al. Ujazdowskie 4, PL-00-478 Warszawa, Poland
11. SRON, Netherlands Institute for Space Research , Niels Bohrweg 4, NL-2333 CA, Leiden, the Netherlands
12. Department of Astrophysics/IMAPP, Radboud University Nijmegen , P.O. Box 9010, NL-6500 GL, Nijmegen, the Netherlands
13. Astro-engineering center (AIUC), Instituto de Astrofísica, Pontificia Universidad Católica de Chile , 7820436, Chile
14. Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117 Heidelberg, Germany
15. Monash Centre for Astrophysics, School of Physics and Astronomy, Monash University , Clayton, Victoria 3800, Australia
16. ARC Center of Excellence for Gravitational Wave Discovery – OzGrav , PO Box 218, Hawthorn VIC 3122, Australia
17. INAF – Osservatorio Astronomico d’Abruzzo , via M. Maggini snc, I-64100 Teramo, Italy
18. The Oskar Klein Centre, Department of Physics, Stockholm University , AlbaNova, SE-106 91 Stockholm, Sweden
19. University of Bath, Department of Physics , Claverton Down, Bath BA2 7AY, UK
20. European Southern Observatory , Alonso de Córdova 3107, Casilla 19, Santiago, Chile