GCN Circular 9082
Subject
GRB 090401B: Xinglong TNT optical Upper Limit
Event
Date
2009-04-03T09:17:29Z (17 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
S.M. Hu, L.P. Xin, W.K. Zheng, Y.L. Qiu, J.Y. Wei,
j. Wang, J.S. Deng and J.Y. Hu on behalf of EAFON report:
We have observed GRB 090401B (Schady et al., GCN
9066; Schady & Oates, GCN 9067, GCN 9074)
with Xinglong TNT telescope from Apr.1, 11:25:22(UT),
3.37 hr after the burst. After combined 9*300s R
band images, no new source was found in our combined
image. The 3 sigma upper limits was obtained
to be R=19.9 mag at the mean time of 2.71 hr after
the trigger, with the calibration to USNO-B1.0 R2 magnitude.
This message may be cited.
For more information about Xinglong GRBs Follow-up
observations, please visit the website:
http://www.xinglong-naoc.org/grb/