Author affiliations
1 School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
2 Institut d'Astrophysique Spatiale (IAS), Bâtiment 121, F-91405, Orsay Cedex, France
3 Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
4 Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, Postfach 1317, 85741, Garching, Germany
5 Centro de Astrofísica Universidade do Porto, 4150-762 Porto, Portugal
6 School of Physics, University of Sydney, Sydney, NSW 2006, Australia
7 High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO 80301, USA
8 Instituto de Astrofisica de Canarias, E-38200, La Laguna, Tenerife, Spain
9 DAPNIA/CEA, CE Saclay, FR-91191 Gif-sur-Yvette Cedex, France
10 Faculty of Arts, Computing, Engineering and Sciences, Sheffield Hallam University, Sheffield S1 1WB, UK
11 Institute of Astronomy, University of Cambridge, Cambridge CB3 0HA, UK
12 LPHEA, Faculté des Sciences Semlalia, Universite Cadi Ayyad, Marrakech, Morocco
13 National Solar Observatory, 950 North Cherry Avenue, Tucson, AZ 85719, USA
14 Departamento de Matemática Aplicada, Faculdade de Ciências da Universidade do Porto, Portugal
15 GEPI, UMR 8111 du CNRS, Observatoire de Paris-Meudon, CNRS, 5 place Jules Janssen 92195 Meudon Cedex, France
16 Dpto. de Astrofisica, Universidad de La Laguna, La Laguna, 38206, Tenerife, Spain
17 Observatoire de Paris, LESIA, CNRS UMR 8109, 92195 Meudon, France
18 National Astronomical Observatory of Japan, Mitaka, Tokyo, 181-8588, Japan
