Image Details
Caption: Figure 2.
95% C.L. differential flux upper limits on an intrinsic (EBL-corrected) E −2 GRB spectrum, derived from the H.E.S.S. observational data taken on GRB 221009A in all nights combined (left) and Night 3 only (right).
© 2023. The Author(s). Published by the American Astronomical Society.