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

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