GCN Circular 11829
Subject
GRB 110328A/ Swift J164449.3+573451 : Xinglong TNT Upper limit
Event
Date
2011-03-29T01:44:00Z (16 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
L.P. Xin, Y.L. Qiu, J.Y. Wei, J. Wang, J.S. Deng,
C. Wu, X. H. Han, M, Zhai on behalf of EAFON report:
We observed GRB 110328A (Cummings et al. GCN 11823)
with Xinglong TNT telescope at 14:13:22 UT on March 28, 2011,
1.26 hour after the first burst trigger, 33 min after the second trigger.
A series of R-band images were obtained with an exposure
time of 300 sec for each frame. At the X-ray location of GRB 110328A,
and the likely optical counterpart position (Cenko et al. GCN 11827) ,
we do not find any new source down to the limit of 20 mag in R band
relatively to USNO B1.0 R2 mag at the mean time of 1.75 hour after the
first trigger .
Further observations from larger telescopes are encouraged.
This message may be cited.