发表机构
Universite Claude Bernard Lyon 1, CRAL UMR5574, ENS de Lyon, CNRS; Leibniz-Institut für Astrophysik Potsdam (AIP); European Southern Observatory (ESO)（里昂第一大学，CRAL UMR5574，巴黎高等师范学院，法国国家科学研究中心; 波茨坦莱布尼茨天体物理研究所; 欧洲南方天文台）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文介绍了2025年10月完成的智利ESO帕拉纳尔天文台4MOST低分辨率光谱仪的测试、安装与技术调试，详述其性能参数及组装集成细节，满足顶级科学要求。
AI 中文摘要
4MOST即4米多目标光谱望远镜，是位于智利欧洲南方天文台（ESO）帕拉纳尔天文台VISTA望远镜的光学光纤馈送多目标光谱（MOS）设备，其主要科学驱动领域为星系考古学、高能物理学、星系演化及宇宙学。4MOST合作联盟由欧洲和澳大利亚的多个研究所组成，由波茨坦莱布尼茨天体物理研究所（AIP）领导。本文聚焦于2025年10月18日完成的、位于智利ESO帕拉纳尔天文台的4MOST仪器低分辨率光谱仪（LRS-A和B）的成功测试、安装及技术调试，提供了两台4MOST光谱仪从抵达集成大厅到望远镜安装过程中的组装、集成及性能细节，重点介绍了为提升性能并满足预期顶级要求所实施的程序优化。4MOST LRS包含2436根光纤，分为两台低分辨率光谱仪LRS-A和LRS-B（1624根光纤、三个臂、370-950 nm、分辨率R>4000）及一台高分辨率光谱仪（812根光纤、三个臂、每臂覆盖约44-69 nm、分辨率R>18000）；光纤定位器覆盖约4.1 deg²的六边形视场，光纤纤芯为85 μm，输出光束为f/3。里昂天体物理研究中心（CRAL）全权负责两台低分辨率光谱仪，每台光谱仪由离轴施密特准直仪组成，该准直仪产生200 mm的光束，通过二向色镜将光束分为三个光谱臂，导向配备标准6k×6k 15微米像素CCD探测器的F/1.73相机。
英文摘要
4MOST, the 4m Multi Object Spectroscopic Telescope, is the optical, fibre-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 leadership of the Leibniz-Institut fur Astrophysik Potsdam (AIP). This paper focuses on the successful testing, installation and technical commissioning of the Low Resolution Spectrographs (LRS-A and B) for the 4MOST instrument at ESO's Paranal Observatory, Chile. This work was completed on October 18. 2025. Details on the assembly, integration, and performance of both 4MOST spectrographs from their arrival in the integration hall through to the telescope installation are provided. Attention is given to the optimization of procedures implemented to enhance performance and meet the expected top-level requirements. The 4MOST LRS features 2436 fibres split into two low-resolution spectrographs LRS-A and LRS-B (1624 fibres, three arms, 370-950 nm, R > 4000) and one high-resolution spectrograph (812 fibres, three arms, ~44-69 nm coverage each, R > 18000). The fibre positioner covers a hexagonal field of view of ~4.1 deg2. The fibers are 85 μm core with an output beam at f/3. The Centre de Recherche Astrophysique de Lyon (CRAL) had the full responsibility for the two low-resolution spectrographs. Each of them is composed of an off-axis Schmidt collimator that produces a 200 mm beam, which is split into three spectral arms by dichroics and directed to F/1.73 cameras with standard 6k x 6k 15 microns pixel CCD detectors.
