[vsnet-grb-info 26572] GRB 201017A: Xinglong TNT upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28672
SUBJECT: GRB 201017A: Xinglong TNT upper limit
DATE:    20/10/17 14:11:41 GMT
FROM:    Liping Xin at NAOC, SVOM  <xlp at 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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