TITLE:   GCN CIRCULAR
NUMBER:  16586
SUBJECT: GRB 140713A : Xinglong TNT upper limit
DATE:    14/07/14 07:32:10 GMT
FROM:    L.P. Xin at NAOC  <xlp@bao.ac.cn>

L. P. Xin,   J.  Z, Yan,  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 140713A (Mangano et al., GCN 16581)  
with Xinglong  0.8-m TNT telescope at 18:44:47 (UT) , 
62 sec after the burst.

No any new optical transient was detected in our single or stacked image
in the XRT error box (Mangano et al., GCN 16581).
Calibrated by nearby USNO B1.0 R2 mag, 
the 3-sigma upper limit magnitudes are shown in the following: 

T-T0(sec,mid)  exposure(sec)    Filter     Upper limit
72                       20                       W          18.0
282                     20*20                  W           19.5

The message may be cited.