1. CNRS, Observatoire astronomique de Strasbourg, Université de Strasbourg, UMR 7550, F-67000 Strasbourg, France
2. CNRS, Centre de Recherche Astrophysique de Lyon, Université Lyon 1, ENS de Lyon, UMR 5574, F-69230 Saint-Genis-Laval, France
3. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
4. Department of Astronomy, University Texas, Austin, TX 78712-1083, USA
5. Institute for Theoretical Physics, University of Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
6. Departamento de Física Teórica M-8, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
7. Centro de Investigación Avanzada en Física Fundamental (CIAFF), Facultad de Ciencias, Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
8. Chosun University, 375 Seosuk-dong, Dong-gu, Gwangjiu 501-759, Korea
9. Astronomy Center, Department of Physics & Astronomy, University of Sussex, Pevensey II Building, Falmer, Brighton BN1 9QH, UK
10. Racah Institute of Physics, Hebrew University, Jerusalem 91904, Israel