LIGO/Virgo S190408an: HMT optical observations. Xu, D. ; Zhu, Z. -P. ; Yu, B. -Y. ; Gao, X. ; Yang, S. ; Zhao, H. -B. ; Li, B. ; Liu, J. -Z. ; Niu, H. -B. ; Liu, J. -H. ; Zhang, X. ; Mao, J. -R. ; Bai, J. -M. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.24085....1X