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GCN Circular 12682

GRB 111215A : Xinglong TNT upper limit
2011-12-15T15:38:37Z (12 years ago)
L.P. Xin at NAOC <>
L.P. Xin,  J.Y. Wei, Y. L. Qiu,  J. Wang, J.S. Deng, 
C. Wu, X. H. Han on behalf of EAFON report:

We began to observe GRB 111215A ( Oates  et al., GCN 12681)
with Xinglong TNT telescope at 14:20:23  (UT), about 16.25 min  after 
the burst.  30 R-band images  were obtained. The exposure time is 60 sec 
for each frame.

No new source was detected in the combined R band image within 
the errorbox of XRT position. The upper limit was estimated 
to be about 18.0  mag derived from USNO B1.0 R2 mag,
at the mean time of 32.75 min after the burst. 

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