H.E.S.S. follow-up observations of GRB 221009A
- Aharonian, F.
- Benkhali, F. A.
- Aschersleben, J.
- Ashkar, H.
- Backes, M.
- Baktash, A.
- Martins, V. B.
- Batzofin, R.
- Becherini, Y.
- Berge, D.
- Bernlöhr, K.
- Bi, B.
- Böttcher, M.
- Boisson, C.
- Bolmont, J.
- de Bony de Lavergne, M.
- Borowska, J.
- Bouyahiaoui, M.
- Bradascio, F.
- Breuhaus, M.
- Brose, R.
- Brun, F.
- Bruno, B.
- Bulik, T.
- Burger-Scheidlin, C.
- Caroff, S.
- Casanova, S.
- Celic, J.
- Cerruti, M.
- Chand, T.
- Chandra, S.
- Chen, A.
- Chibueze, J.
- Chibueze, O.
- Cotter, G.
- Dai, Shi (R20363)
- Mbarubucyeye, J. D.
- Devin, J.
- Djannati-Atai, A.
- Dmytriiev, A.
- Doroshenko, V.
- Egberts, K.
- Einecke, S.
- Ernenwein, J. P.
- Fegan, S.
- Fichet de Clairfontaine, G.
- Filipovic, Miroslav (R7673)
- Fontaine, G.
- Fubling, M.
- Funk, S.
- et al, .
DOIAbstract
GRB 221009A is the brightest gamma-ray burst (GRB) ever detected. To probe the very-high-energy (VHE; >100 GeV) emission, the High Energy Stereoscopic System (H.E.S.S.) began observations 53 hr after the triggering event, when the brightness of the moonlight no longer precluded observations. We derive differential and integral upper limits using H.E.S.S. data from the third, fourth, and ninth nights after the initial GRB detection, after applying atmospheric corrections. The combined observations yield an integral energy flux upper limit of Φ UL 95 % = 9.7 Ã 10 − 12 erg cm − 2 s − 1 above E thr = 650 GeV. The constraints derived from the H.E.S.S. observations complement the available multiwavelength data. The radio to X-ray data are cons...
Add to ORKG