SEARCH FOR 10 TEV GAMMA-RAY BURSTS WITH THE TIBET AIR SHOWER ARRAY

A search for gamma-ray bursts at the 10 TeV energy region was made usi ng data of the Yangbajing air shower experiment in Tibet. About 4 x 10 (8) events were analyzed to search for shower clusters appearing in a given time interval and a given small sky bin. An equal-zenith angle m ethod is used to estimate the background. Some clusters show the exces s to the background but with less significance as the evidence of gamm a-ray bursts. The much-higher sensitivity of the Yangbajing Phase II a rray to the detection of the 10 TeV gamma-ray bursts is discussed.