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GCN Circular 28672

Subject
GRB 201017A: Xinglong TNT upper limit
Date
2020-10-17T14:11:41Z (4 years ago)
From
Liping Xin at NAOC, SVOM <xlp@nao.cas.cn>
L. P. Xin (NAOC), X. F. Wang(THU),  Y. L. Qiu(NAOC), J. Y. Wei(NAOC),  J. Wang(GXU),  
L. H. Li (NAOC),  C. Wu(NAOC),  E. W. Liang(GXU), X. H. Han (NAOC)and J. S. Deng(NAOC)report:

We began to observe GRB 201017A ( A. D'Ai et al., GCN 28666) 
with Xinglong TNT telescope, China, at 11:10:24.8 (UT), 17th. Otc. 2020, 
about 84 min after the burst, 

10  x 300 sec R band images were obtained. 
No any new source was detected in the XRT errorbox ( A. D'Ai et al., GCN 28666)  
down to the limit magnitude of 19.5 mag in R band for any single image.
The brightness is calibrated to the USNO B1.0 R2 mag.

More analysis are still continuing. 

We acknowledge the excellent support from Xinglong staff Sen Liu. 

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