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Proceedings Paper

On-sky PSF reconstruction with APETy
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Paper Abstract

PSF reconstruction (PSF-R) for AO systems was pioneered by J.P. Veran in 1997 [1] and was successfully demonstrated at CFHT/PUEO. A recent example was presented in the case for the Keck telescope in 2012 [2]. Nevertheless, it has been a constant struggle since to implement these technique as observatory standard. APETy (A PSF Estimation Tool for Yorick) has been developed since 2009 and applied for PSF reconstruction for the Near Infrared Coronograph Imager (NICI) at the Gemini South Observatory based on a 85 element curvature AO system. Using on-sky wavefront sensor data, we estimate the seeing (r0) from deformable mirror commands and reconstruct diffraction limited images (52 mas resolution) with an accuracy of approximately 90% when compared to the science images. APETy is publically available via GitHub ( and can be adapted to other systems. APETy development includes the PSF-R variation proposed by Gendron [3] which proved to be almost 4 times faster than the original approach.

Paper Details

Date Published: 21 July 2014
PDF: 12 pages
Proc. SPIE 9148, Adaptive Optics Systems IV, 91484V (21 July 2014); doi: 10.1117/12.2055144
Show Author Affiliations
Rodrigo Olguin, Pontificia Univ. Católica de Chile (Chile)
Markus Hartung, Gemini Observatory (Chile)
Thomas Hayward, Gemini Observatory (Chile)
Damien Gratadour, LESIA, CNRS, Observatorie de Paris (France)
Andrés Guesalaga, Pontificia Univ. Católica de Chile (Chile)

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

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