Design and Performance of a New Generation, Compact, Low Cost, Very High Doppler Precision and Resolution Optical Spectrograph
文献类型：会议论文
| 作者 | Ge, J; Zhao, B; Powell, S; Wang, J ; Fletcher, A; Chang L(常亮); Groot, J; Wan, XK; Jakeman, H; Myers, D
|
| 出版日期 | 2012 |
| 会议名称 | Conference on Ground-Based and Airborne Telescopes IV |
| 会议日期 | 2012-07-01 |
| 会议地点 | Amsterdam, NETHERLANDS |
| 关键词 | high Doppler precision exoplanets habitable zone survey GKM dwarfs high spectral resolution optical spectrograph and radial velocity |
| 卷号 | 8446 |
| 通讯作者 | Ge, J (report author), Univ Florida, Dept Astron, Bryant Space Sci Ctr 211, Gainesville, FL 32611 USA. |
| 英文摘要 | This paper is to report the design and performance of a very high Doppler precision cross-dispersed echelle spectrograph, EXtremely high Precision ExtrasolaR planet Tracker III (EXPERT-III), as part of a global Exoplanet Tracker (ET) network. The ET network is designed to hunt low mass planets, especially habitable rocky planets, around GKM dwarfs. It has an extremely high spectral resolution (EHR) mode of R=110,000 and a high resolution (HR) mode of R=56,000 and can simultaneously cover 0.38-0.9 mu m with a 4kx4k back-illuminated Fairchild CCD detector with a single exposure. EXPERT-III is optimized for high throughput by using two-prisms cross-disperser and a large core diameter fiber (2 arcsec on sky, or 80 mu m at f/4) to collect photons from the Kitt Peak National Observatory (KPNO) 2.1m telescope. The average overall detection efficiency is similar to 6% from above the atmosphere to the detector for the EHR Mode and about 11% for the HR mode. The extremely high spectral resolution in a compact design (the spectrograph dimension, 1.34x0.8x0.48 m) is realized by coupling the single input 80 mu m telescope fiber into four 40 mu m fibers and re-arranging the four small core diameter fibers into a linear fiber slit array (a one-to-four fiber image slicer). EXPERT-III is operated in a vacuum chamber with temperature controlled to similar to 2 milli-Kelvin rms for an extended period of time. The radial velocity (RV) drift is controlled to within 10 meters/second (m/s) over a month. EXPERT-III can reach a photon noise limited RV measurement precision of similar to 0.3 m/s for a V=8 mag GKM type dwarf with small rotation (vsini = 2 km/s) in a 15 min exposure. EXPERT-III's RV measurement uncertainties for bright stars are primarily limited by the Thorium-Argon (ThAr) calibration source (similar to 0.5 m/s). EXPERT-III will serve as an excellent public accessible high resolution optical spectroscope facility at the KPNO 2.1m telescope. |
| 收录类别 | EI ; CPCI |
| 产权排序 | 第二完成单位 |
| 会议网址 | http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1362630 |
| 会议录 | Proceedings of SPIE - GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV
 |
| 会议录出版者 | SPIE-INT SOC OPTICAL ENGINEERING |
| 学科主题 | Engineering; Instruments & Instrumentation; Optics |
| 会议录出版地 | 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA |
| 语种 | 英语 |
| ISSN号 | 0277-786X |
| ISBN号 | 978-0-8194-9147-3 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/314]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 推荐引用方式 GB/T 7714 | Ge, J,Zhao, B,Powell, S,et al. Design and Performance of a New Generation, Compact, Low Cost, Very High Doppler Precision and Resolution Optical Spectrograph[C]. 见:Conference on Ground-Based and Airborne Telescopes IV. Amsterdam, NETHERLANDS. 2012-07-01.http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1362630. |
入库方式： OAI收割
来源：云南天文台
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