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Photometric Calibration of Spectral Imaging CoronaGraph with Dual-wavelength Observation

文献类型：期刊论文

作者Tang, Ning1; Liu, Wei-Xin1; Mao, Xian-Liang1; Yu, Xiao-Yu1; Zuo, Xiu-Hui1; Sun, Bo-Yu1; Zheng, Hao-Ran1; Liu, Da-Yang1; Zhang XF(张雪飞)2; Sun, Ming-Zhe1
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2025-05-01
卷号25期号:5
关键词Sun: corona instrumentation: miscellaneous methods: data analysis techniques: photometric
ISSN号1674-4527
DOI10.1088/1674-4527/adcc7d
产权排序第2完成单位
文献子类Article
英文摘要The Spectral Imaging CoronaGraph (SICG) serves as the optical observation equipment of E-corona in the Chinese Meridian Project Phase II, which aims at monitoring the initial source of solar activities. For the purpose of in-depth exploration and space weather forecast in the full chain of Sun-Earth space, SICG is designed to work at two wavelengths of 637.4 and 530.3 nm in the quasi-simultaneous observation mode. Thus, the photometric calibration is more challenging to guarantee accurate scientific data of SICG. Two solar photometers are specially developed to match the observing wavelengths and make the photoelectronic conversion traceable. Correspondingly, the calibration process selects the solar disk center as the brightness reference, which compensates for the photometric losses along the atmospheric transmission path. This study derives the calibration coefficients from the two photometers for the E-coronal brightness processing in real time. By modeling aerosol absorption and scattering and comparing with continuous flat-field observation, the photometric calibration of SICG is evaluated with deviations of 2.1% and 2.3% at 637.4 nm and 530.3 nm, respectively. Based on this, the evolution speed of a multi-temperature coronal loop was analyzed, facilitating further research into the physical mechanisms of coronal mass ejections.
学科主题天文学 ; 天体物理学 ; 实测天体物理学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词SOLAR ; ASTROMETRY
资助项目Chinese Meridian Project (CMP); National Natural Science Foundation of China[42230203]; National Natural Science Foundation of China[42374220]; National Natural Science Foundation of China[12173086]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001491993200001
出版者IOP Publishing Ltd
资助机构Chinese Meridian Project (CMP) ; National Natural Science Foundation of China[42230203, 42374220, 12173086]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28308]  
专题无名山观测站
作者单位1.Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, China; liuwx@sdu.edu.cn;
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式
GB/T 7714		 Tang, Ning,Liu, Wei-Xin,Mao, Xian-Liang,et al. Photometric Calibration of Spectral Imaging CoronaGraph with Dual-wavelength Observation[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2025,25(5).
APA Tang, Ning.,Liu, Wei-Xin.,Mao, Xian-Liang.,Yu, Xiao-Yu.,Zuo, Xiu-Hui.,...&Xia, Li-Dong.(2025).Photometric Calibration of Spectral Imaging CoronaGraph with Dual-wavelength Observation.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,25(5).
MLA Tang, Ning,et al."Photometric Calibration of Spectral Imaging CoronaGraph with Dual-wavelength Observation".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 25.5(2025).

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来源：云南天文台

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