1. Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
2. ONERA, DOTA, Unité HRA, 29 avenue de la division Leclerc, 92322 Chatillon, France
3. INAF - Osservatorio Astrofisico di Arcetri Largo E. Fermi 5, 50125 Firenze (Italy)
4. European Southern Observatory, Karl-Schwarzschild-str-2, 85748 Garching, Germany