  WIDGET is a robotic telescope for monitoring the HETE-2 field-of-view to
detect Gamma-ray Burst optical flashes or possible optical precursors. The
system has 62degx62deg wide field-of-view which covers about 80% of HETE-2 one
with a 2kx2k Apogee U10 CCD camera and a Canon EF 24mm f/1.4 wide-angle lens
without a bandpass filter. WIDGET has been in operation since June 2004 at
Akeno observing site where is about 200 km apart from Tokyo. Typical limiting
magnitude with S/N=3 at the site is V=10mag for 5 seconds exposure and V=11mag
for 30 seconds exposure. We had already six coincident observations with HETE-2
position alerts. It was, however, cloudy for all cases due to rainy season in
Japan. Expected number of coincident observations under clear sky is about 5
events per year. We will extend the system in early 2005 for Swift era to
monitor optical transients in wider field-of-view, multi-color or polarization
modes.
