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Proceedings Paper

Final performance and lesson-learned of SAXO, the VLT-SPHERE extreme AO: from early design to on-sky results
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Paper Abstract

The extreme AO system, SAXO (SPHERE AO for eXoplanet Observation), is the heart of the SPHERE system, feeding the scientific instruments with flat wave front corrected from all the atmospheric turbulence and internal defects. We will present the final performance of SAXO obtained during the instrument AIT in Europe as well as the very first on-sky results. The main requirements and system characteristics will be recalled and the full AO loop performance will be quantified and compared to original specifications. It will be demonstrated that SAXO meets or even exceeds (especially its limit magnitude and its jitter residuals) its challenging requirements (more than 90% of SR in H band and a 3 mas residual jitter). Finally, after 10 years of AO developments, from early design to final on-sky implementations, some critical system aspects as well as some important lesson-learned will be presented in the perspective of the future generation of complex AO systems for VLTs and ELTs.

Paper Details

Date Published: 7 August 2014
PDF: 15 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91481U (7 August 2014); doi: 10.1117/12.2055423
Show Author Affiliations
T. Fusco, ONERA (France)
Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
J.-F. Sauvage, ONERA (France)
Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
C. Petit, ONERA (France)
A. Costille, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
K. Dohlen, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
D. Mouillet, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
J.-L. Beuzit, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
M. Kasper, European Southern Observatory (Germany)
M. Suarez, European Southern Observatory (Germany)
C. Soenke, European Southern Observatory (Germany)
E. Fedrigo, European Southern Observatory (Germany)
M. Downing, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
P. Baudoz, LESIA, CNRS, Observatoire de Paris (France)
A. Sevin, LESIA, CNRS, Observatoire de Paris (France)
D. Perret, LESIA, CNRS, Observatoire de Paris (France)
A. Barrufolo, INAF - Osservatorio Astronomico di Bologna (Italy)
B. Salasnich, INAF - Osservatorio Astronomico di Bologna (Italy)
P. Puget, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
F. Feautrier, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
S. Rochat, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
T. Moulin, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
A. Deboulbé, Institut de Planétologie et d’Astrophysique de Grenoble, CNRS (France)
E. Hugot, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
A. Vigan, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille, Univ. (France)
D. Mawet, European Southern Observatory (Germany)
J. Girard, European Southern Observatory (Germany)
N. Hubin, European Southern Observatory (Germany)


Published in SPIE Proceedings Vol. 9148:
Adaptive Optics Systems IV
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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