NICI：结合冠状动脉造影、ADI和SDI
NICI: combining coronagraphy, ADI, and SDI
摘要：
近红外日冕成像仪（NICI）是双子座南望远镜的高对比度AO成像仪。该相机包括一个冠状掩模和双通道成像光谱差分成像（SDI）。该仪器也可以在固定的卡塞格伦旋转器模式下用于角微分成像（ADI）。而日冕照相术，SDI和ADI之前已经应用于直接成像搜索系外行星。NICI是第一次将这三种技术结合起来。我们提出了初步的NICI调试数据使用这些技术，并表明SDI和ADI相结合的结果显着的收益。
英文摘要：
The Near-Infrared Coronagraphic Imager (NICI) is a high-contrast AO imager at the Gemini South telescope. The camera includes a coronagraphic mask and dual channel imaging for Spectral Differential Imaging (SDI). The instrument can also be used in a fixed Cassegrain Rotator mode for Angular Differential Imaging (ADI). While coronagraphy, SDI, and ADI have been applied before in direct imaging searches for exoplanets. NICI represents the first time that these 3 techniques can be combined. We present preliminary NICI commissioning data using these techniques and show that combining SDI and ADI results in significant gains.
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