CHIRON—A Fiber Fed Spectrometer for Precise Radial Velocities
CHIRON—A Fiber Fed Spectrometer for Precise Radial Velocities
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DOI：
10.1086/674012
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发表时间：
2013-09
影响因子：
3.5
通讯作者：
A. Tokovinin;D. Fischer;M. Bonati;M. Giguere;P. Moore;C. Schwab;J. Spronck;A. Szymkowiak
中科院分区：
文献类型：
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作者：
A. Tokovinin;D. Fischer;M. Bonati;M. Giguere;P. Moore;C. Schwab;J. Spronck;A. Szymkowiak
CHIRON光学高分辨率阶梯光栅光谱仪于2011年在CTIO的1.5米望远镜上投入使用。该仪器的设计具有高通量和稳定性，目标是高精度和高节奏地监测明亮恒星的径向速度，以发现低质量系外行星。当使用总效率（包括望远镜和探测器）为6%或更高的切片器时，光谱分辨率达到R = 79 000，而明亮恒星的分辨率为R = 136 000。覆盖415-880 nm的固定光谱范围。中阶梯光栅放置在真空外壳中，仪器温度稳定在± 0.2°。稳定的照明是由一个八边形的多模光纤具有良好的光扰特性。碘池用于波长校准。本文介绍了该仪器的主要光学系统、光纤馈源、探测器、测量仪等方面，以及观测过程和数据处理。
The CHIRON optical high-resolution echelle spectrometer was commissioned at the 1.5 m telescope at CTIO in 2011. The instrument was designed for high throughput and stability, with the goal of monitoring radial velocities of bright stars with high precision and high cadence for the discovery of low-mass exoplanets. Spectral resolution of R = 79 000 is attained when using a slicer with a total (including telescope and detector) efficiency of 6% or higher, while a resolution of R = 136 000 is available for bright stars. A fixed spectral range of 415–880 nm is covered. The echelle grating is housed in a vacuum enclosure and the instrument temperature is stabilized to ± 0.2°. Stable illumination is provided by an octagonal multimode fiber with excellent light-scrambling properties. An iodine cell is used for wavelength calibration. We describe the main optics, fiber feed, detector, exposure-meter, and other aspects of the instrument, as well as the observing procedure and data reduction.