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Calibration Tests of a 25-GHz Mode-spacing Broadband Astro-comb on the Fiber-fed High Resolution Spectrograph (HRS) of the Chinese 2.16-m Telescope
文献类型:期刊论文
作者 | Zhibo Hao1,2,3; Huiqi Ye1,2; Jian Han1,2; Yuanjie Wu1,2; Yang Zhai1,2; Dong Xiao1,2 |
刊名 | Publications of the Astronomical Society of the Pacific |
出版日期 | 2018-12 |
卷号 | 130期号:994页码:125001(1-12) |
关键词 | astro-comb laser frequency comb radial velocities data analysis |
英文摘要 |
A 25-GHz mode-spacing astro-comb with 470–720 nm wavelength coverage has been installed as the calibration source on the fiber-fed High Resolution Spectrograph (HRS) of the Chinese 2.16-m telescope at Xinglong Observatory. The calibration tests were carried out based on the single-channel system of HRS. The results have achieved a 2–8 times (for different orders) higher wavelength solution accuracy than the thorium argon (ThAr) lamp, and a short-term repeatability of 0.1m s−1, which is around the photon noise limit. It proved that the coupling system linking the astro-comb to HRS successfully suppressed the negative effects of laser speckles. The comb-line overlapping exists in the acquired spectrum of the astro-comb on HRS. We demonstrated that when determining the comb-line center, the comb-line overlapping leads to a systematic bias, which is caused by asymmetrical sampling, and meanwhile a larger uncertainty. The correction for the systematic bias is feasible by simulating the overlapping comb lines according to actual comb-line spacing and pixel phase and then calculating the difference of the fitted line center with the true line center. A higher accuracy of wavelength solution has been achieved after correction. |
学科主题 | 天文技术与方法 |
语种 | 英语 |
WOS记录号 | WOS:000456554400001 |
源URL | [http://ir.niaot.ac.cn/handle/114a32/1533] |
专题 | 期刊论文 |
作者单位 | 1.南京天文光学技术研究所 2.天文光学技术重点实验室 3.中国科学院大学 |
推荐引用方式 GB/T 7714 | Zhibo Hao,Huiqi Ye,Jian Han,et al. Calibration Tests of a 25-GHz Mode-spacing Broadband Astro-comb on the Fiber-fed High Resolution Spectrograph (HRS) of the Chinese 2.16-m Telescope[J]. Publications of the Astronomical Society of the Pacific,2018,130(994):125001(1-12). |
APA | Zhibo Hao,Huiqi Ye,Jian Han,Yuanjie Wu,Yang Zhai,&Dong Xiao.(2018).Calibration Tests of a 25-GHz Mode-spacing Broadband Astro-comb on the Fiber-fed High Resolution Spectrograph (HRS) of the Chinese 2.16-m Telescope.Publications of the Astronomical Society of the Pacific,130(994),125001(1-12). |
MLA | Zhibo Hao,et al."Calibration Tests of a 25-GHz Mode-spacing Broadband Astro-comb on the Fiber-fed High Resolution Spectrograph (HRS) of the Chinese 2.16-m Telescope".Publications of the Astronomical Society of the Pacific 130.994(2018):125001(1-12). |
入库方式: OAI收割
来源:南京天文光学技术研究所
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