Abstract

The algorithm for the reduction of spectroscopic observations with the ASTRONIRCAM camera-spectrograph installed at the 2.5-m telescope of the Sternberg Astronomical Institute of the Moscow State University is described. The instrument allows spectra of astronomical objects with long (\(280^{\prime\prime}\)) and short (\(10^{\prime\prime}\)) slits to be taken in the wavelength range from 1 to 2.5 \(\mu\)m. The measured resolution reaches \(R=1270\) for a \(0\overset{{}^{\prime\prime}}{.}9\) slit; the light efficiency of the system changes from 6 to \(14\%\) in the working wavelength range in the long-slit mode and from 1 to \(2\%\) in the cross-dispersion mode. The transmission is limited by the quality of the grisms used. We have estimated the fraction of scattered light and studied the mechanical flexures and temperature drifts of the structure.

中文翻译：

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ASTRONIRCAM光谱模式的表征

摘要

描述了使用安装在莫斯科国立大学斯特恩伯格天文研究所2.5米望远镜上的ASTRONIRCAM相机光谱仪减少光谱观测值的算法。该仪器允许在1至2的波长范围内拍摄长（\（280 ^ {\ prime \ prime} \））和短（\（10 ^ {\ prime \ prime} \））狭缝的天文物体的光谱。2.5 \（\ mu \）米 对于（0 \ overset {{} ^ {\ prime \ prime}} {。} 9 \）狭缝，测量的分辨率达到\（R = 1270 \）；在长缝模式下，系统的光效率在工作波长范围内从6变为\（14 \％\），从1变为\（2 \％\）在交叉分散模式下。传输受到所用磨粒质量的限制。我们已经估计了散射光的比例，并研究了结构的机械弯曲和温度漂移。