[vsnet-grb-info 14065] GRB 131024B : Xinglong TNT upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15379
SUBJECT: GRB 131024B : Xinglong TNT upper limit
DATE:    13/10/25 13:48:56 GMT
FROM:    L.P. Xin at NAOC  <xlp at bao.ac.cn>

L. P. Xin,   J. Y. Wei,   Y. L. Qiu, J. S. Deng,  J. Wang,  
X. H. Han and C. Wu on behalf of EAFON report:

We began to observe GRB 131024B  (Krimm et al., GCN 15371) 
with Xinglong 0.8-m TNT telescope at 21:38:56  (UT), 
about 3.4 min after the burst.  3*300 sec  R-band images were obtained. 

No any optical counterpart within the XRT error circle  was detected 
down to a limit of 18.4 mag in R band, calibrated by USNO B1.0 R2mag 
at the mean time of 11.25 min after the burst.

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