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GCN Circular 9225

GRB 090424: TNT optical observations
2009-04-24T15:21:45Z (15 years ago)
W.K. Zheng at NAOC <>
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.

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