[vsnet-grb-info 7671] GRB 090424: TNT optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9225
SUBJECT: GRB 090424: TNT optical observations
DATE:    09/04/24 15:21:45 GMT
FROM:    W.K. Zheng at NAOC  <zwk at bao.ac.cn>

L.P. Xin, W.K. Zheng, Y.L. Qiu, J.Y. Wei,
j. Wang, J.S. Deng, Y. Urata and J.Y. Hu 
on behalf of EAFON report:

TNT quickly responsed to the GRB 090424 (Swift trigger 350311;
Cannizzo et al. GCN 9223) in automatical mode, the first
images was taken start 14:13:36, 87s after the burst.
The optical afterglow (Cannizzo et al. GCN 9223; Yuan GCN 9224)
was clearly detected in our early white and R bands images,
after preliminary reduction, we estimated the afterglow have
faded about 3.5 mag from ~100s to ~1000s after the burst. 
Observation is still under going.

This message may be cited.