Correction of distortion for optimal image stacking in wide field adaptive optics: application to GeMS data

Anaïs Bernard; Laurent M. Mugnier; Benoit Neichel; Thierry Fusco; Sophie Bounissou; Manash Samal; Morten Andersen; Annie Zavagno; Henri Plana

doi:10.1117/12.2231287

26 July 2016 Correction of distortion for optimal image stacking in wide field adaptive optics: application to GeMS data

Anaïs Bernard, Laurent M. Mugnier, Benoit Neichel, Thierry Fusco, Sophie Bounissou, Manash Samal, Morten Andersen, Annie Zavagno, Henri Plana

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Proceedings Volume 9909, Adaptive Optics Systems V; 99091S (2016) https://doi.org/10.1117/12.2231287
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The advent of Wide Field Adaptive Optics (WFAO) systems marks the beginning of a new era in high spatial resolution imaging. The newly commissioned Gemini South Multi-Conjugate Adaptive Optics System (GeMS) combined with the infrared camera Gemini South Adaptive Optics Imager (GSAOI), delivers quasi diffraction-limited images over a field of ∼ 2 arc-minutes across. However, despite this excellent performance, some variable residues still limit the quality of the analyses. In particular, distortions severely affect GSAOI and become a critical issue for high-precision astrometry and photometry. In this paper, we investigate an optimal way to correct for the distortion following an inverse problem approach. Formalism as well as applications on GeMS data are presented.

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Anaïs Bernard, Laurent M. Mugnier, Benoit Neichel, Thierry Fusco, Sophie Bounissou, Manash Samal, Morten Andersen, Annie Zavagno, and Henri Plana "Correction of distortion for optimal image stacking in wide field adaptive optics: application to GeMS data", Proc. SPIE 9909, Adaptive Optics Systems V, 99091S (26 July 2016); https://doi.org/10.1117/12.2231287

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KEYWORDS

Distortion

Stars

Point spread functions

Adaptive optics

Error analysis

Gemini Observatory

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