用于 SDSS-V 本地体积成像仪的望远镜控制软件和原型定标器

IF 1.7 3区 工程技术 Q2 ENGINEERING, AEROSPACE
Hojae Ahn, Florian Briegel, Jimin Han, Mingyu Jeon, Thomas M. Herbst, Sumin Lee, Woojin Park, Sunwoo Lee, Inhwan Jung, Tae-Geun Ji, Changgon Kim, Geon Hee Kim, Wolfgang Gaessler, Markus Kuhlberg, Hyun Chul Park, Soojong Pak, Nicholas P. Konidaris, Niv Drory, José R. Sánchez-Gallego, Cynthia S. Froning, Solange Ramirez, Juna A. Kollmeier
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引用次数: 0

摘要

第五次斯隆数字巡天本地体积制图仪(LVM)是一种宽视场积分场单元巡天,它使用了由四台160毫米固定望远镜组成的阵列,并配备了稳压器,以尽量减少活动部件的数量。每台望远镜独立观测科学或校准场,并与科学曝光同步。我们开发了用于 LVM 观测的 LVM 采集和制导软件包(LVMAGP)--经过优化的望远镜控制软件程序,它可以同时控制四个聚焦器、三个 K 光镜、一个光纤选择器、四个支架(定焦器)和七个制导相机。该软件基于分层架构和 SDSS 框架,提供三个关键序列:自动对焦、场采集和自动导引。我们设计并制造了一个原型定标仪,用于测试望远镜指向模型和 LVMAGP 软件。原型模型的反射镜设计为等栅开背式,重量减轻了 46%,并能快速达到热平衡。此外,我们还模拟了由螺栓扭矩、自重力和热变形引起的偏转,并预测由光学机械倾斜引起的指向模型的最大散度为 4′.4,这可以通过现场采集序列进行补偿。我们使用原模型定点仪对 LVMAGP 进行了实天测试,获得的场采集和自动导航精度分别为 0″.38 和 1″.5。除了自动导航规格外,它满足了所有要求,这个问题将通过拉斯坎帕纳斯天文台硬件组件之间更精确的校准来解决。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Telescope control software and proto-model siderostat for the SDSS-V Local Volume Mapper
The fifth Sloan Digital Sky Survey Local Volume Mapper (LVM) is a wide-field integral field unit survey that uses an array of four 160 mm fixed telescopes with siderostats to minimize the number of moving parts. An individual telescope observes the science or calibration field independently and is synchronized with the science exposure. We developed the LVM Acquisition and Guiding Package (LVMAGP)-optimized telescope control software program for LVM observations, which can simultaneously control four focusers, three K-mirrors, one fiber selector, four mounts (siderostats), and seven guide cameras. This software is built on a hierarchical architecture and the SDSS framework and provides three key sequences: autofocus, field acquisition, and autoguide. We designed and fabricated a proto-model siderostat to test the telescope pointing model and LVMAGP software. The mirrors of the proto-model were designed as an isogrid open-back type, which reduced the weight by 46% and enabled reaching thermal equilibrium quickly. In addition, deflection due to bolting torque, self-gravity, and thermal deformation was simulated, and the maximum scatter of the pointing model induced by the tilt of optomechanics was predicted to be 4′.4, which can be compensated for by the field acquisition sequence. We performed a real sky test of LVMAGP with the proto-model siderostat and obtained field acquisition and autoguide accuracies of 0″.38 and 1″.5, respectively. It met all requirements except for the autoguide specification, which will be resolved by more precise alignment among the hardware components at Las Campanas Observatory.
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来源期刊
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.
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