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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 8.

Stacked maps of positional residuals for each CCD after GD modeling. The left panel shows the mean residual in the X-direction, while the right panel shows the mean residual in the Y-direction. Each pixel represents the mean positional residual averaged within a 100 × 100 pixel bin in the local CCD coordinate system.

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