L. P. Xin, Y. J. Xiao, P. P. Zhang, R. S. Zhang, J. Wang, J. Y. Wei,
E. W. Liang, X. G. Wang, Y. G. Yang, X. M. Lu, L. Huang, H. B. Cai,
Y. L. Qiu, Y. Xu, Y. J. Xiao, Y. T. Zheng, C. Wu, J. S. Deng, D. W. Xu,
D. TURPIN, H. L. Li, and W. L. Dong, report:
We started to observe GRB 190114B ( Siegel et al., GCN 23686 )
with GWAC-F60B 60cm optical telescope at 19:46:26 UT,
Jan. 14th 2019, about 14 min after the burst.
The afterglow reported by ( Goad et al., GCN 23691; Fernandez-Garcia et al., GCN 23694;
Pozanenko et al., GCN 23696) was not detected in R band images.
The upper limit is estimated to be about 18.3 mag calibrated by nearby USNO-B1.0 stars.
GWAC-F60B is operated by Guangxi university and NAOC, CAS, at Xinglong observatory, China.
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