1. Sub-department of Astrophysics, Department of Physics, University of Oxford , Keble Road, Oxford OX1 3RH, UK
2. Cosmic Dawn Center (DAWN) , Denmark
3. DTU-Space, Technical University of Denmark , Elektrovej 327, DK-2800 Kgs. Lyngby, Denmark
4. Yonsei Frontier Lab and Department of Astronomy, Yonsei University , 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Republic of Korea
5. South-Western Institute for Astronomy Research, Yunnan University, Chenggong District , Kunming 650091, P. R. China
6. School of Physics and Astronomy, Cardiff University , Queens Buildings, The Parade, Cardiff CF24 3AA, UK
7. Ens de Lyon, CNRS, Centre de Recherche Astrophysique de Lyon (CRAL) UMR5574, Université de Lyon 1 , F-69230 Saint-Genis-Laval, France
8. Department of Astronomical Science, SOKENDAI (The Graduate University of Advanced Studies) , Mitaka, Tokyo 181-8588, Japan
9. National Astronomical Observatory of Japan, National Institutes of Natural Sciences , Mitaka, Tokyo 181-8588, Japan