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Signature of a Magnetar Central Engine from the Multiband Afterglow of GRB 151027A Associated with a Supernova

  • Authors: Liang-Jun Chen, Xiang-Gao Wang, Hou-Jun Lü, WeiKang Zheng, Daniel A. Perley, Da-Bin Lin, Yihan Wang, De-Feng Kong, You-Dong Hu, Jie Xia, S. Bradley Cenko, Hong-Bang Liu, Fei Xie, Jing Lü, En-Wei Liang, Bing Zhang, Alexei V. Filippenko

Liang-Jun Chen et al 2026 The Astrophysical Journal 1002 .

  • Provider: AAS Journals

Caption: Figure 2.

Zoom-ins on regions of the Keck/HIRES spectrum of the afterglow of GRB 151027A, showing strong absorption lines in association with the host system. The top panel reveals fine-structure Fe II* absorption from material near the progenitor site at z = 0.81115. The bottom three panels show absorption from transitions of Mg II λλ2796.35, 2803.53, Mg I λ2852.96, and Ca II λ3934.78, all at z = 0.81095, the redshift of GRB 151027A.

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