1. Max-Planck-Institut für extraterrestrische Physik (MPE), Giessenbachstrasse 1, D-85748 Garching bei München, Germany
2. Institute for Astronomy & Astrophysics, National Observatory of Athens, V. Paulou & I. Metaxa, 11532, Greece
3. Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2a, FI-00014 Helsinki, Finland
4. Pontificia Universidad Católica de Chile, Instituto de Astrofísica, Casilla 306, Santiago 22, Chile
5. Excellence Cluster Universe, Boltzmannstr. 2, D-85748, Garching, Germany
6. Millenium Institute of Astrophysics, Vicuña MacKenna 4860, 7820436 Macul, Santiago, Chile
7. IRAP, Université de Toulouse, CNRS, UPS, CNES, Toulouse, 31400, France
8. National Astronomy Observatories, Chinese Academy of Science, Beijing, 100101, P.R. China
9. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
10. Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, UK
11. Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, E-18080 Granada, Spain
12. Departamento de Física Teórica and CIAFF, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
13. Dipartimento di Fisica e Astronomia, Alma Mater Studiorum Universita di Bologna, via Gobetti 93/2, I-40129 Bologna, Italy
14. INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna, via Gobetti 93/3, I-40129 Bologna, Italy
15. Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany