Spectral characterization of the Grism and Prism slitless spectrometers for the Nancy Grace Roman Space Telescope

IF 1.7 3区工程技术 Q2 ENGINEERING, AEROSPACE

Journal of Astronomical Telescopes Instruments and Systems Pub Date : 2024-02-01 DOI:10.1117/1.jatis.10.1.014003

Evan Bray, Mateo Batkis, Victor J. Chambers, Margaret Dominguez, Bente Eegholm, Guangjun Gao, Qian Gong, Wesley Halliday, Elias Howe, Jeffrey Kruk, Eliot Malumuth, Sangeeta Malhotra, Catherine Marx, James Rhoads, Maxime Rizzo, Joshua E. Schlieder, Laurie Seide, Eric R. Switzer, Jay Voris

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Abstract

The Roman Space Telescope Grism and Prism assemblies will allow the wide-field instrument (WFI) to perform slitless, multi-object spectroscopy across the complete field of view. These optical elements play a critical role in the High Latitude Wide Area and High Latitude Time Domain Surveys, which are designed to produce robust spectroscopic redshifts for millions of objects over the mission lifetime. To facilitate the characterization of these assemblies, a dedicated test bed was designed and utilized to perform a wide variety of spectroscopic measurements over the full range of operational wavelengths and field angles. Characterized features include, but are not limited to dispersion magnitude, dispersion clocking, encircled energy, total throughput, and bandpass edges. We present the results of this experimental campaign in which the Grism and Prism assemblies met or exceeded many of their design requirements and discuss measurement limitations.

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南希-格蕾丝-罗曼太空望远镜的光栅和棱镜无缝分光计的光谱特性分析

罗曼太空望远镜的光栅和棱镜组件将使宽视场仪器（WFI）能够在整个视场内进行无缝多天体分光。这些光学元件在高纬度广域巡天和高纬度时域巡天中发挥着至关重要的作用，这两项巡天的目的是在飞行任务有效期内为数百万个天体产生可靠的光谱红移。为了便于对这些组件进行特征描述，设计并使用了一个专用的测试平台，以便在全部工作波长和场角度范围内进行各种光谱测量。表征的特征包括但不限于色散幅度、色散时钟、环绕能量、总吞吐量和带通边缘。我们介绍了这次实验活动的结果，其中 "光栅 "和 "棱镜 "组件达到或超过了许多设计要求，并讨论了测量的局限性。

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来源期刊

Journal of Astronomical Telescopes Instruments and Systems Engineering-Mechanical Engineering

CiteScore

4.40

自引率

13.00%

发文量

119

期刊介绍： The Journal of Astronomical Telescopes, Instruments, and Systems publishes peer-reviewed papers reporting on original research in the development, testing, and application of telescopes, instrumentation, techniques, and systems for ground- and space-based astronomy.