GCN Circular 13500
Subject
GRB 120722A: Xinglong TNT optical afterglow candidate
Event
Date
2012-07-22T14:18:45Z (14 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
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 120722A (Melandri et al. GCN 13499)
with Xinglong TNT telescope in R-band at 12:56:53 (UT),
3.5 min after the burst. An optical counterpart was detected
in our combined image within the errorbox of X-ray afterglow location
(Melandri et al. GCN 13499) with a brightness of about 20.8 mag in R band,
calibrated against the USNO B1.0 R2mag.
The coordinates and magnitude of the reference star we used
are 15:21:54.116 +13:15:50.70, J2000 and R2=16.91 mag in USNO B1.0.
This message may be cited.
Further observations are encouraged.
For more information about Xinglong GRBs Follow-up
observations, please visit the website:
http://www.xinglong-naoc.org:8080/grb/index.html
We thank Chunlan Lu for performing these observations.