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WFST Follow-up of S251112cm: Searching for an Optical Counterpart to a Subsolar-mass Compact-binary Merger Candidate

  • Authors: Zhengyan Liu, Zelin Xu, Ji-an Jiang, Wen Zhao, Zhiping Jin, Zigao Dai, Dezheng Meng, Yefei Yuan, Xuefeng Wu, Lulu Fan, Xu Kong, Xander J. Hall, Antonella Palmese, Feng Li, Ming Liang, Binyang Liu, Zhen Wan, Hairen Wang, Jian Wang, Tinggui Wang, Hongfei Zhang, Xianzhong Zheng, Qingfeng Zhu

Zhengyan Liu et al 2026 The Astrophysical Journal Letters 1011 .

  • Provider: AAS Journals

Caption: Figure 5.

Sky coverage of the WFST and DECam follow-up observations in the southern localization region, shown in a globe projection. Blue and green circles with radii of 1.∘4 and 1.∘1 approximate the WFST and DECam fields of view, respectively, illustrating their relative coverage and overlap. The 50% and 90% credible regions of the updated Bilby skymap of S251112cm (Ligo Scientific Collaboration et al. 2025c) are outlined in red and black, respectively. The gray contour marks Galactic extinction at E(B − V) = 0.3 mag (E. F. Schlafly & D. P. Finkbeiner 2011).

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