The Spectro-Polarimeter (SP) of the Andrei B. Severny Solar Tower Telescope (STT) at the Crimean Astrophysical Observatory: Optical Design and Implementation

arXiv - PHYS - Solar and Stellar Astrophysics Pub Date : 2024-09-17 DOI:arxiv-2409.11289

Alexander Kutsenko, Valery Terebizh, Andrei Dolgopolov, Valentina Abramenko, Andrei Plotnikov, Dmitriy Semyonov, Vladimir Skiruta, Vyacheslav Lopukhin

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Abstract

The Spectro-Polarimeter (SP) is a new instrument installed at the upgraded Andrei B. Severny Solar Tower Telescope (STT) at the Crimean Astrophysical Observatory. The instrument is a traditional echelle slit dual-beam spectropolarimeter with temporal modulation of the polarization. STT-SP provides simultaneous spectropolarimetric observations of the Sun within three 15 Angstrom wide spectral ranges around photospheric Fe I 5250, Fe I 5324, and chromospheric Mg I b2 5172 spectral lines. The spectral resolution of the instrument reaches 70,000 with the seeing-constrained slit width of 1 arcsec. The field-of-view of STT-SP is 200 arcsec allowing one to map a moderate size active region within a single raster scan. The instrument will provide new opportunities in the analysis of magnetic fields and thermodynamics of the lower atmosphere of the Sun. In this paper we describe the optical design of STT-SP and present the preliminary results acquired during the commissioning of the instrument.

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克里米亚天体物理观测台的 Andrei B. Severny 太阳塔望远镜（STT）的分光偏振计（SP）：光学设计与实施

光谱-偏振计（SP）是安装在克里米亚天体物理观测台（Crimean AstrophysicalObservatory）升级版安德烈-B-塞弗尼太阳塔望远镜（STT）上的新仪器。该仪器是一种传统的梯形狭缝双光束谱仪，具有偏振时间调制功能。STT-SP 围绕光球层 Fe I 5250、Fe I 5324 和色球层 Mg I b2 5172 光谱线，在三个 15 埃宽光谱范围内同时对太阳进行光谱测极观测。STT-SP 的视场为 200 弧秒，可以在一次光栅扫描中绘制中等大小的活动区。该仪器将为分析太阳低层大气的磁场和热力学提供新的机会。在本文中，我们介绍了 STT-SP 的光学设计，并介绍了仪器试运行期间获得的初步结果。

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arXiv - PHYS - Solar and Stellar Astrophysics

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