GCN Circular 14415
Subject
GRB130420A : Xinglong TNT optical upper limit
Date
2013-04-20T15:59:58Z (11 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
L.P. Xin, M. Zhai, 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 130420A (Page et al., GCN 14406 )
using 80cm TNT telescope located at Xinglong observatory, China
at 12:16:56 UT on 2013-04-20. We obtained 12x300s R-band images in a
poor seeing and cloudy weather, with a median time of 5.3 hr after the BAT trigger.
The afterglow reported (Page et a., GCN 14406 ) is not detected in the stacked image,
down to a 3 sigma limit of R~18.0 mag, calibrated with USNO B2 stars.
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