Off-axis PSF reconstruction for integral field spectrograph: instrumental aberrations and application to Keck/OSIRIS data
Off-axis PSF reconstruction for integral field spectrograph: instrumental aberrations and application to Keck/OSIRIS data
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积分场摄谱仪的离轴 PSF 重建：仪器像差及其在 Keck/OSIRIS 数据中的应用
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
P. Turri
中科院分区：
文献类型：
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作者：
A. Ciurlo;T. Do;G. Witzel;Jessica R. Lu;J. Lyke;M. Fitzgerald;A. Ghez;R. Campbell;P. Turri
凯克I号上的积分场摄谱仪OSIRIS已被用来测量银河系中心超大质量黑洞周围恒星的运动。提供的小视场和区域的拥挤阻止了任何良好的PSF估计。并行成像器可与IFU同时使用。然而，由于非等晕现象和仪器像差，其19弧秒的距离阻止了观察到的PSF直接应用于IFU。加州大学洛杉矶分校的银河中心小组开发了一种算法来预测Keck AO图像的PSF变化（离轴PSF重建，AIROPA软件包）。AIROPA允许我们使用并行成像仪来正确预测IFU的PSF。我们修改了该软件包，使其适用于OSIRIS成像仪和IFU（AIROPA-IFU）的情况，并表征了两种探测器的仪器像差。在这里，我们提出了这个后处理工具的OSIRIS数据集的银河系中心的应用程序的初步结果。
The integral field spectrograph OSIRIS at Keck I has been used to measure the motion of the stars around the supermassive black hole at the Center of the Galaxy. The small field of view provided and the crowding of the region prevent any good PSF estimate. A parallel imager can be used simultaneously to the IFU. However, its distance of 19 arcseconds prevents the observed PSF to be directly applied to the IFU because of anisoplanatism and instrumental aberrations. The Galactic Center Group at UCLA has developed an algorithms to predict PSF variability for Keck AO images (Off-axis PSF reconstruction, AIROPA software package). AIROPA allows us to use the parallel imager to correctly predict the IFU’s PSF. We modified this package to adapt it to the case of OSIRIS imager and IFU (AIROPA-IFU) and characterized the instrumental aberrations of both detectors. Here, we present preliminary results of the application of this post-processing tool to OSIRIS datasets of the Galactic Center.