Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S

H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +213

The long gamma-ray burst (GRB) 100621A, at the time the brightest X-ray transient ever detected by Swift-XRT in the $0.3\text{–}10$ keV range, has been observed with the H.E.S.S…