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WFST Astrometric Calibration. I. Modeling Global Geometric Distortion with Zernike Polynomials

Authors: Chao Yang, Min Fang, Xian Zhong Zheng, Guoliang Li, Binyang Liu, Zheng Lou, Zhen Wan, Miaomiao Zhang, Tian-Rui Sun, Lulu Fan, Xiaoling Zhang, Xu Kong, Yongquan Xue, Wen Zhao, Bin Li, Wentao Luo, Feng Li, Wei Liu, Jian Wang, Hongfei Zhang, Hao Liu, Qinfeng Zhu, Hairen Wang, Dazhi Yao

Chao Yang et al 2026 The Astronomical Journal 171 .

Provider: AAS Journals

Caption: Figure 9.

Variation of astrometric accuracy for all exposures in the 20240327 dataset after correction with Zernike polynomials of different orders. The solid lines indicate the mean astrometric accuracy across all exposures for each order, while the shaded regions represent the 1σ scatter among these exposures.

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