TITLE:   GCN CIRCULAR
NUMBER:  11554
SUBJECT: GRB110112A: TNT optical afterglow candidate
DATE:    11/01/12 13:17:22 GMT
FROM:    L.P. Xin at NAOC  <xlp@bao.ac.cn>

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

We began to observe GRB110112A (stamatikos et al., GCN 11553 ) 
with Xinglong TNT telescope at 10:08:35.375 (UT), 6 hours after 
the burst. 16 images in R-band were obtained with an exposure 
time of 300 sec for each frame. 

After combining all these images, a new marginal source was 
found within the errorbox  of X-ray counterpart 
( stamatikos et al., GCN 11553). 

Its coordinates ( RA and Dec ) are 21:59:43.8 26:27:25.9 (J2000)
with an uncertainty of  about 1 arcsecond.

The brightness of the source is estimated to be about 
19.6 +/- 0.3 mag which is derived from USNO B1.0 R2 mag 
at the mean time of 6.5 hour after the burst. 

Further observations and confirmation are encouraged.

This message may be cited.

For more information about Xinglong GRBs Follow-up
observations, please visit the website:
http://www.xinglong-naoc.org/grb/