4MOST low resolution spectrograph performances
4MOST low resolution spectrograph performances
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4MOST 低分辨率光谱仪性能
DOI：
10.1117/12.2629787
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
J. Richard
中科院分区：
文献类型：
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作者：
K. Disseau;D. Boudon;D. Chapuis;E. Daguisé;A. Jarno;A. Jeanneau;J. Krogager;F. Laurent;M. Lehnert;J. Migniau;A. Pécontal;E. Pecontal;A. Remillieux;J. Richard
4米多目标光谱望远镜（most）是ESO位于智利帕拉纳天文台的VISTA望远镜即将使用的光纤馈电MOS设备。它的主要科学驱动力是在银河考古学、高能物理学、星系演化和宇宙学领域。在波茨坦莱布尼茨天体物理研究所（AIP）的领导下，4MOST联盟由欧洲和澳大利亚的几个研究所组成。4MOST目前处于组装、集成和测试阶段，预计将于2023年开始科学操作。4MOST的设计将2436根光纤分为两个低分辨率光谱仪（1624根光纤，370-950 nm, R < 4000）和一个高分辨率光谱仪（812根光纤，~44-69 nm覆盖，R < 18000）。光纤定位器覆盖约4.1°²的六角形视场。CRAL对低分辨率光谱仪负有全部责任。它们中的每一个都由一个离轴准直器组成，该准直器收集来自光纤的f/3光束，并提供200毫米的准直光束，然后由于两个二向色散而分成三个臂。每个臂由一个施密特校正器、一个VPHG、一个f/1.73相机和一个标准的6k × 6k 15µm像素探测器组成。LRS的制造、装配、集成和测试（MAIT）阶段于2018年5月开始。首台LRS现已完全集成、对齐和测试，并于2021年12月在CRAL现场成功通过了本地验收审查。本文描述了开发的程序，以测试光谱仪，并证明其符合要求。本文介绍了所取得的性能，特别是在光谱分辨率和采样、光谱纯度、串扰、吞吐量、杂散光、光密性和稳定性方面。
4MOST, the 4m Multi Object Spectroscopic Telescope, is an upcoming optical, fiber-fed, MOS facility for the VISTA telescope at ESO's Paranal Observatory in Chile. Its main science drivers are in the fields of galactic archeology, high-energy physics, galaxy evolution and cosmology. The 4MOST consortium consists of several institutes in Europe and Australia under the leadership of the Leibniz-Institut für Astrophysik Potsdam (AIP). 4MOST is currently in its Assembly, Integration and Tests Phase with an expected start of science operations in 2023. The design of 4MOST features 2436 fibers split into two low-resolution spectrographs (1624 fibers, 370-950 nm, R < 4000) and a high-resolution spectrograph (812 fibers, ~44-69 nm coverage, R < 18000). A fiber positioner covers a hexagonal field of view of ~4.1 deg². CRAL has the full responsibility of the Low Resolution Spectrographs. Each of them is composed of an off-axis collimator collecting the f/3 beam coming from the fibers and providing a 200 mm collimated beam, which is then split into three arms thanks to two dichroics. Each arm is composed of a Schmidt corrector, a VPHG, an f/1.73 camera and a standard 6k by 6k 15µm pixel detector. Manufacturing, Assembly, Integration and Test (MAIT) phase of the LRS started in May 2018. The first LRS has now been fully integrated, aligned and tested and its Local Acceptance Review on site at CRAL passed successfully in December 2021. This paper describes the procedures developed to test the spectrograph and demonstrate its compliance with the requirements. Performances achieved are presented throughout the paper, especially in terms of spectral resolving power and sampling, spectral purity, cross-talk, throughput, straylight, light tightness and stability.
4MOST宽视场校正器的组装和对准
DOI：
10.1117/12.2629247
发表时间：
2022
期刊：
--
影响因子：
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作者：
Cunningham M
通讯作者：
Cunningham M
4MOST：4米多目标光谱望远镜项目处于组装、集成和测试阶段
DOI：
10.1117/12.2628965
发表时间：
2022
期刊：
--
影响因子：
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作者：
De Jong R
通讯作者：
De Jong R