Evidence for Two Distinct Broad-line Regions from Reverberation Mapping of PG 0026+129

Authors: Hu, Chen; Li, Sha-Sha; Guo, Wei-Jian; Yang, Sen; Yang, Zi-Xu; Bao, Dong-Wei; Jiang, Bo-Wei; Du, Pu; Li, Yan-Rong; Xiao, Ming; Songsheng, Yu-Yang; Yu, Zhe; Bai, Jin-Ming; Ho, Luis C.; Bian, Wei-Hao; Brotherton, Michael S.; Yuan, Ye-Fei; Aceituno, Jesus; Winkler, Hartmut; Wang, Jian-Min; SEAMBH Collaboration