Correction of distortion for optimal image stacking in Wide Field Adaptive Optics: Application to GeMS data

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.

arXiv comment10 pages, 6 figures

References in corpus (4)

• Gemini multi-conjugate adaptive optics system review I: Design, trade-offs and integration
• Spitzer View of Young Massive Stars in the LMC HII Complexes. II. N159
• Deep GeMS/GSAOI near-infrared observations of N159W in the Large Magellanic Cloud
• Deep near-infrared adaptive optics observations of a young embedded cluster at the edge of the RCW 41 HII region