[vsnet-grb-info 7701] GRB 090426: TNT confimation of optical counterpart

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9255
SUBJECT: GRB 090426: TNT confimation of optical counterpart
DATE:    09/04/26 13:32:17 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 090426 (Swift trigger 350479;
Cummings et al. GCN 9254) in automatical mode, the first
images was taken start 12:50:03 (UT), 76s after the burst.
We detect a fading source at the position consistent with the
UVOT coordinate (Cummings et al. GCN 9254) thus confirmed the
OT of short burst GRB 090426. The brightness in white band
is ~16.4 at 76s after the burst calibrated with USNO A-2.0 R band.
Observation is still under going.
Spectral observation is encouraged.

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