1. Cosmic Dawn Center (DAWN)
2. Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen N, Denmark
3. Department of Astronomy, The University of Texas at Austin , 2515 Speedway Blvd, Stop C1400, Austin, TX 78712, USA
4. Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory , SE-43992 Onsala, Sweden
5. Univ Lyon, Univ Lyon1, Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, F-69230 Saint-Genis-Laval, France
6. Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan
7. Department of Physics and Astronomy, University College London , Gower Street, London WC1E 6BT, UK
8. Astrophysics, Department of Physics, University of Oxford , Keble Road, Oxford OX1 3RH, UK
9. School of Sciences, European University Cyprus , Diogenes Street, Engomi, 1516 Nicosia, Cyprus
10. Dipartimento di Fisica e Astronomia, Università di Firenze , Via G. Sansone 1, I-50019 Sesto Fiorentino (Firenze), Italy
11. European Southern Observatory , Karl-Schwarzschild-Strasse 2, D-85748 Garching, Germany