A highly stable spectrophotometric capability for the Origins Space Telescope (OST) mid-infrared imager, spectrometer, coronagraph (MISC)
A highly stable spectrophotometric capability for the Origins Space Telescope (OST) mid-infrared imager, spectrometer, coronagraph (MISC)
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为起源太空望远镜 (OST) 中红外成像仪、光谱仪、日冕仪 (MISC) 提供高度稳定的分光光度测量能力
DOI：
10.1117/12.2311896
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
T. Roellig et al.
中科院分区：
文献类型：
--
作者：
T. Matsuo;T. Greene;T. Roellig et al.
本文介绍了过境摄谱仪设计的起源太空望远镜中红外成像仪，光谱仪，日冕仪（MISC）和它的性能，通过解析公式和数值模拟。凌日摄谱仪是基于一个密集的光瞳光谱设计，形成多个独立的光谱上的检测器平面，并最大限度地减少光学系统中的系统噪声。这种设计还可以阻挡进入透射光谱周围的像素的任何热光。发生在检测器和读出电子设备中的增益波动通过使用多个消隐像素来精确地校正。我们发现，用于OST概念1的直径为9.3米的凌日摄谱仪可能实现光子噪声限制性能，并允许通过以10 pc的60个凌日观测值绕晚M型和中M型恒星运行的凌日行星的透射光谱来检测生物特征气体。
This paper describes the transit spectrograph designed for the Origins Space Telescope mid-infrared imager, spectrometer, coronagraph (MISC) and its performance derived through analytical formulation and numerical simulation. The transit spectrograph is designed based on a densified pupil spectroscopy design that forms multiple independent spectra on the detector plane and minimizes the systematic noise in the optical system. This design can also block any thermal light incoming into pixels around the transit spectra. The gain fluctuations occurring in the detector and readout electronics are accurately corrected by use of a number of blanked-off pixels. We found that the transit spectrograph for the OST concept 1 with a diameter of 9.3m potentially achieves the photon-noise-limited performance and allows detection of biosignature gases through transmission spectroscopy of transiting planets orbiting late- and middle-M type stars at 10 pc with 60 transit observations.