Performance of the CHIRON high-resolution Echelle spectrograph

被引：9
|
作者：
Schwab, Christian [1 ]
Spronck, Julien F. P. [1 ]
Tokovinin, Andrei
Szymkowiak, Andrew [1 ]
Giguere, Matthew [1 ]
Fischer, Debra A. [1 ]
机构：
[1] Yale Univ, New Haven, CT 06520 USA
来源：
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV | 2012年 / 8446卷
关键词：
Spectroscopy; exoplanets; radial velocities; Doppler method; Echelle; fiber-fed spectrograph; iodine cell;
D O I：
10.1117/12.925108
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
CHIRON is a fiber-fed Echelle spectrograph with observing modes for resolutions from 28,000 to 120,000, built primarily for measuring precise radial velocities (RVs). We present the instrument performance as determined during integration and commissioning. We discuss the PSF, the effect of glass inhomogeneity on the cross-dispersion prism, temperature stabilization, stability of the spectrum on the CCD, and detector characteristics. The RV precision is characterized, with an iodine cell or a ThAr lamp as the wavelength reference. Including all losses from the sky to the detector, the overall efficiency is about 6%; the dominant limitation is coupling losses into the fiber due to poor guiding.
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页数：16
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