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Small telescopes being effective: MAGIC or not? 小型望远镜是否有效?
Pub Date : 2023-01-01 DOI: 10.1093/rasti/rzad045
Victor L Afanasiev, Eugene A Malygin, Elena S Shablovinskaya, Roman I Uklein, Vladimir R Amirkhanyan, Alexander E Perepelitsyn, Irina V Afanasieva
The paper describes the MAGIC multi-mode focal reducer (Monitoring of Active Galaxies by Investigation of their Cores), commissioned on the 1-m Zeiss-1000 telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences in September 2020. Three observational modes are currently realised: photometry, polarimetry, and long-slit spectroscopy. Reducing the focal length makes it possible to obtain a sufficiently large field of view for photometry and a large slit height for spectroscopy of $sim$12$'$, as well as a large field of view for polarimetry with a quadrupole Wollaston prism of $sim$6$'$.4. This feature makes the complex study of extended nebulae and galaxies efficient. The MAGIC capabilities are presented in examples of observations of various astronomical objects. The spectral mode in the range of 4000-7200 AA provides the spectral resolution $R sim$ 1000; for a starlike target up to 14 mag in medium-band filters with a seeing of 1$''$ for 20 minutes of total exposure, the photometry accuracy is better than 0.01 mag and the polarization accuracy is better than 0.6%. Especially for the new focal reducer, an offset guide and a position angle rotation system were implemented. The results of the modernization of the baffle system in the optical scheme of the telescope for the suppression of scattered light are also described.
本文介绍了俄罗斯科学院特殊天体物理天文台1米蔡司-1000望远镜于2020年9月投入使用的MAGIC多模减焦器(监测活动星系通过调查其核心)。目前实现了三种观测模式:光度法、偏振法和长缝光谱学。减少焦距使得有可能获得足够大的视场测光和光谱的大狭缝高度$ $12$ $ $ $,以及一个大的视场极化与四极Wollaston棱镜$ $ $6$ $ $.4。这一特点使得对扩展星云和星系的复杂研究变得高效。MAGIC的能力在观测各种天体的例子中得到了体现。光谱模式在4000-7200 AA范围内提供光谱分辨率$R sim$ 1000;对于在中波段滤光片下,总曝光20分钟,视场为1$ " $的14等星状目标,测光精度优于0.01等,偏振精度优于0.6%。针对新型减焦装置,设计了偏置导轨和位置转角旋转系统。本文还介绍了对望远镜光学方案中的折流板系统进行现代化改造以抑制散射光的结果。
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RAS Techniques and Instruments
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