Abstract
The WIDe-field telescope for Gamma-ray burst in Early Timing (WIDGET) is an automated optical telescope designed to detect the expected optical prompt emission associating with the Gamma-Ray Burst (GRBs). To search for the optical prompt emissions or possible pre-cursors, the system is programmed to track the HETE-2 and Swift field of views. The WIDGET has been operated since May 2004. So far, it succeeded 15 times to observe the GRB field at the same time of HETE-2 or Swift trigger and we succeeded to obtain the upper limits for the 7 GRBS.
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