宽视场自适应光学中最佳图象叠加的畸变校正:应用于GeMS数据
Correction of distortion for optimal image stacking in Wide Field Adaptive Optics: Application to GeMS data
摘要:
宽视场自适应光学(WFAO)系统的出现标志着高空间分辨率成像新时代的开始。新投入使用的Gemini South多共轭自适应光学系统(GeMS)与红外相机Gemini South自适应光学成像仪(GSAOI)相结合,可在2弧分的视场内提供准衍射极限图像。然而,尽管这种优异的性能,一些可变的残留物仍然限制了分析的质量。特别是畸变严重影响GSAOI,成为高精度天体测量和测光的关键问题。在本文中,我们研究了一种最佳的方法来纠正失真的逆问题的方法。形式化以及应用的GeMS数据。
英文摘要:
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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