[1] INAF Osservatorio Astron Capodimonte, Salita Moiariello 16, I-80131 Naples, Italy
[2] INAF Osservatorio Astron Brera, Via Bianchi 46, I-23807 Merate, LC, Italy
[3] Univ Turku, Finnish Ctr Astron ESO FINCA, FI-20014 Turku, Finland
[4] Univ Turku, Dept Phys & Astron, Tuorla Observ, FI-20014 Turku, Finland
[5] INAF Osservatorio Astron Catania, Via S Sofia 78, I-95123 Catania, Italy
[6] INAF Osservatorio Astron Trieste, Via GB Tiepolo 11, I-34143 Trieste, Italy
[7] INAF Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy
[8] Weizmann Inst Sci, Herzl St 234, IL-7610001 Rehovot, Israel
[9] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
[10] ESO, Karl Schwarzschild Str 2, D-85748 Garching, Germany
[11] Univ Andres Bello, Avda Republ 252, Santiago, Chile
[12] TNG, FGG INAF, Rambla JA Fernandez Perez 7, E-38712 Brena Baja, TF, Spain
[13] INAF Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy
[14] Incident Angle Oy, Capsiankatu 4 A, FI-20320 Turku, Finland
[15] Tel Aviv Univ, Tel Aviv, Israel
[16] DARK Cosmol Ctr, Juliane Manes Vej 30, DK-2100 Copenhagen, Denmark
[17] ASRO, Tierankatu 4B, FI-20520 Turku, Finland
[18] Millennium Inst Astrophys MAS, Nuncio Monsenor Sotero Sanz 100, Santiago, Chile
[19] Queens Univ Belfast, Astrophys Res Ctr, Belfast BT7 1NN, Antrim, North Ireland