基于兴隆观测基地80厘米望远镜的CSST无缝光谱地面测试  

CSST Slitless Spectroscopy Ground Test Based on the 80 cm Telescope at the Xinglong Observatory

作　　者：邱晓晴 范舟[2] 宋轶晗[2] 顾弘睿 姜海娇 李静[1] Qiu Xiaoqing;Fan Zhou;Song Yihan;Gu Hongrui;Jiang Haijiao;Li Jing(China West Normal University,Nanchong 637000,China;National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;Tsinghua University,Beijing 100084,China)

机构地区：[1]西华师范大学,四川南充637000 [2]中国科学院国家天文台,北京100101 [3]中国科学院大学,北京100049 [4]清华大学,北京100084

出　　处：《天文研究与技术》2023年第6期564-575,共12页Astronomical Research & Technology

基　　金：国家自然科学基金(12273027,11873013);四川省青年科技创新研究团队项目(21CXTD0038);西华师范大学创新团队基金项目(KCXTD2022-6)资助

摘　　要：我国预计2025年发射的巡天空间望远镜(Chinese Space Station Telescope,CSST),主要用于开展大规模的多色成像与无缝光谱巡天工作。发射前需要利用地基望远镜对空间望远镜的光学成像系统、探测器,以及设备长时间运行稳定性进行地面测试。设计了兴隆观测基地80 cm望远镜的无缝光谱地面测试,利用A型恒星、B型恒星和沃尔夫拉叶星HD4004的强吸收和发射线特征,拟合色散方程,并发现色散方程具有空间分布特征。对HR3173的53条数据的零级谱位置信息及色散方程系数进行了二次曲面拟合,并利用该曲面对HR3173零级像位置范围内的HR718数据进行了波长定标,得到的CCD上8×13 pixels范围内的平均视向速度精度为51 km/s。The Chinese Space Station Telescope(CSST),which is expected to be launched in 2025,will mainly be used for large-scale multicolor imaging and slitless surveys.Before launch,it is necessary to use ground-based telescopes to conduct ground tests on the optical imaging system,detectors,and equipment of the space telescope for long-term operational stability.This dissertation designs a slitless spectral ground test for the 80 centimeter telescope at Xinglong Observation Observatory.By utilizing the strong absorption and emission line characteristics of A-type stars,B-type stars,and the Wolf-Rayet star HD4004,the dispersion equation is fitted and found to have spatial distribution characteristics.We performed quadratic surface fitting on the zero order spectral position information and dispersion equation coefficients of 53 pieces of HR3173 data,and used this curve to calibrate the wavelength of HR718 data within the zero order image position range of HR3173.The average radial velocity accuracy obtained was 51 km/s.

关 键 词：无缝光谱 巡天空间望远镜 波长定标 

分 类 号：P111.2[天文地球—天文学]