Calibration procedures for the CHASE/HIS science data  

作　　者：Ye Qiu ShiHao Rao Chuan Li Cheng Fang MingDe Ding Zhen Li YiWei Ni WenBo Wang Jie Hong Qi Hao Yu Dai PengFei Chen XiaoSheng Wan Zhi Xu Wei You Yuan Yuan HongJiang Tao XianSheng Li YuKun He Qiang Liu 

机构地区：[1]School of Astronomy and Space Science,Nanjing University,Nanjing 210023,China [2]Key Laboratory for Modern Astronomy and Astrophysics(Nanjing University),Ministry of Education,Nanjing 210023,China [3]Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China [4]Shanghai Institute of Satellite Engineering,Shanghai 201109,China [5]Changchun Institute of Optics,Fine Mechanics and Physics,University of Chinese Academy of Sciences,Changchun 130033,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2022年第8期10-17,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by China National Space Administration。

摘　　要：The Hα line is an important optical line in solar observations containing the information from the photosphere to the chromosphere. To study the mechanisms of solar eruptions and the plasma dynamics in the lower atmosphere, the Chinese Hα Solar Explorer(CHASE) was launched into a Sun-synchronous orbit on October 14, 2021. The scientific payload of the CHASE satellite is the Hα Imaging Spectrograph(HIS). The CHASE/HIS acquires, for the first time, seeing-free Hα spectroscopic observations with high spectral and temporal resolutions. It consists of two observational modes. The raster scanning mode provides full-Sun or region-of-interest spectra at Hα(6559.7-6565.9 ?) and Fe I(6567.8-6570.6 ?) wavebands. The continuum imaging mode obtains full-Sun photospheric images at around 6689 ?. In this paper, we present detailed calibration procedures for the CHASE/HIS science data, including the dark-field and flat-field correction, slit image curvature correction, wavelength and intensity calibration, and coordinate transformation. The higher-level data products can be directly used for scientific research.

关 键 词：space-based telescope solar physics CHROMOSPHERE photosphere 

分 类 号：P182.2[天文地球—天文学]