GCN Circular 22141
Subject
GRB171120A: GWAC-F60A upper limit
Date
2017-11-21T11:39:32Z (6 years ago)
From
L.P. Xin at NAOC <xlp@nao.cas.cn>
L. P. Xin, W. L. Dong, P. P. Zhang, X. H. Han, J. Y. Wei, E. W. Liang,
X. G. Wang, Y. J. Xiao, Y. G. Yang, X. M. Lu, L. Huang, H. B. Cai,
X. M. Meng, Y. L. Qiu, Y. Xu, Y. J. Xiao, Y. T. Zheng, R. S. Zhang, J. Wang,
C. Wu, J. S. Deng, D. W. Xu, T. Damien and H. L. Li report:
We observed GRB 171120A (Tohuvavohu et al., GCN 22133) with
GWAC-F60A 60cm optical telescope at 19:06:58 UT, Nov. 20th 2017,
about 5.75 hours after the burst.
No any new source was not detected in the XRT error circle
(Evens et al., GCN 22135) in our 15*300 sec stacked R-band image
down to the 3 sigma limit of about 19.5 mag at the mid time of 6.25 hours
after the burst. The brightness was calibrated by USNO B1.0 R2 catalogues.
GWAC-F60A is operated by Guangxi university and NAOC, CAS,
at Xinglong observatory, China.
The message may be cited.