The Co-alignment of Winged HαData Observed by the New Vacuum Solar Telescope

作     者：Yun-Fang Cai Xu Yang Yong-Yuang Xiang Xiao-Li Yan Zhen-Yu Jin Hui Liu Kai-Fan Ji Yun-Fang Cai;Xu Yang;Yong-Yuang Xiang;Xiao-Li Yan;Zhen-Yu Jin;Hui Liu;Kai-Fan Ji

作者机构：Yunnan ObservatoriesChinese Academy of SciencesKunming 650011China Big Bear Solar ObservatoryNew Jersey Institute of Technology40386 North Shore LaneBig Bear CityCA92314USA 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2022年第22卷第6期

页      面：101-108页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：Supported by the National Natural Science Foundation of China 

主　　题：Sun:atmosphere methods:data analysis-techniques:imaging spectroscopy-techniques image processing 

摘      要：The New Vacuum Solar Telescope(NVST)has been releasing its novel winged Hαdata(WHD)since 2021 April,namely the Hαimaging spectroscopic *** with the prior released version,the new data are further coaligned among the off-band images and packaged into a standard solar physics community *** this study,we illustrate the alignment algorithm used by the novel WHD,which is mainly based on the optical flow method to obtain the translation offset between the winged *** quantitatively evaluate the alignment results of two images with different similarities,we calculate the alignment accuracies between the images of different off-band and line center,*** result shows that our alignment algorithm could reach up to the accuracy of about 0.″1 when the off-band of winged image is lower than 0.6?.In addition,we introduce the final product of the WHD in detail,which can provide convenience for the solar physicists to use high-resolution Hαimaging spectroscopic data of NVST.