[vsnet-grb-info 13286] GRB 130511A: Upper limit by Xinglong TNT optical observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14623
SUBJECT: GRB 130511A:  Upper limit by Xinglong TNT optical observation
DATE:    13/05/11 15:14:12 GMT
FROM:    L.P. Xin at NAOC  <xlp at bao.ac.cn>

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

We began to observe the field of GRB 130511A  (Krimm et al. GCN 14620)
using  80cm TNT telescope located at Xinglong observatory, China,
at 41.9 min after the burst on 12:12:41 UT, May 11th, 2013.    
15*300sec R-band images was obtained.  

The reported optical counterpart (Krimm et al. GCN 14620;  Cucchiara et a. GCN 14621)  
was not detected in all single images and the combined image,  
down to the upper limit of R~19.6 mag calibrated by USNO B1.0 R2 mag,
 at the mean time of  62.3 min after the trigger time. 

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