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H. Abdalla
Author
F. Aharonian
Author
ORCID : 0000-0003-1157-3915
F. Ait Benkhali
Author
E.O. Angüner 1
Author
Cornelia Arcaro
Author
C. Armand 2
Author
T. Armstrong
Author
ORCID : 0000-0001-5067-2620
H. Ashkar 3
Author
ORCID : 0000-0002-2153-1818IdRef : 257870121
Moritz Backes
Author
V. Baghmanyan
Author
ORCID : 0000-0003-0477-1614
V. Barbosa Martins
Author
ORCID : 0000-0002-5085-8828
Anna Barnacka
Author
M. Barnard
Author
ORCID : 0000-0003-1720-7959
Y. Becherini
Author
David Berge
Author
K. Bernlöhr
Author
ORCID : 0000-0001-8065-3252
B. Bi
Author
Elisabetta Bissaldi
Author
M. Böttcher
Author
ORCID : 0000-0002-8434-5692IdRef : 160534011
C. Boisson 4
Author
ORCID : 0000-0001-5893-1797
J. Bolmont 5
Author
M. de Bony de Lavergne 2
Author
M. Breuhaus
Author
ORCID : 0000-0003-0268-5122
F. Brun 3
Author
ORCID : 0000-0003-0770-9007
T. Bylund
Author
ORCID : 0000-0003-2946-1313
S. Caroff 2
Author
IdHAL : sami-caroffORCID : 0000-0002-1103-130XIdRef : 203957318
A. Carosi 2
Author
S. Casanova
Author
ORCID : 0000-0002-6144-9122
T. Chand
Author
ORCID : 0000-0002-1833-3749
S. Chandra
Author
ORCID : 0000-0002-8776-1835
A. Chen
Author
G. Cotter
Author
ORCID : 0000-0002-9975-1829IdRef : 260800260
M. Curyło
Author
J. Damascene Mbarubucyeye
Author
ORCID : 0000-0002-4991-6576
I.D. Davids
Author
J. Davies
Author
ORCID : 0000-0002-2394-4720
A. Dmytriiev 4
Author
A. Donath
Author
ORCID : 0000-0003-4568-7005
V. Doroshenko
Author
ORCID : 0000-0001-8162-1105
L. Dreyer
Author
ORCID : 0000-0002-4971-3672
S. Einecke
Author
ORCID : 0000-0001-9687-8237
G. Emery 5
Author
J.-P. Ernenwein 1
Author
K. Feijen
Author
S. Fegan 7
Author
A. Fiasson 2
Author
G. Fichet de Clairfontaine 4
Author
IdHAL : gaetan-fichet-de-clairfontaineORCID : 0000-0003-1143-3883
G. Fontaine 7
Author
G. Giavitto
Author
ORCID : 0000-0002-7629-6499
L. Giunti 3, 6
Author
D. Glawion
Author
ORCID : 0000-0003-4865-7696
J.F. Glicenstein 3
Author
M.-H. Grondin 9
Author
ORCID : 0000-0002-8383-251XIdRef : 14852026X
J. Hahn
Author
M. Haupt
Author
G. Hermann
Author
M. Jamrozy
Author
ORCID : 0000-0002-0870-7778
D. Jankowsky
Author
F. Jankowsky
Author
A. Jardin-Blicq
Author
ORCID : 0000-0002-6738-9351
V. Joshi
Author
ORCID : 0000-0003-4467-3621
I. Jung-Richardt
Author
E. Kasai
Author
M.A. Kastendieck
Author
K. Katarzyński
Author
U. Katz
Author
ORCID : 0000-0002-7063-4418
D. Khangulyan
Author
ORCID : 0000-0002-7576-7869
B. Khélifi 6
Author
IdHAL : bruno-khelifi
S. Klepser
Author
ORCID : 0000-0002-8949-4275
W. Kluźniak
Author
Nu. Komin
Author
ORCID : 0000-0003-3280-0582
R. Konno
Author
ORCID : 0000-0003-1892-2356
K. Kosack 3
Author
ORCID : 0000-0001-8424-3621IdRef : 26272118X
D. Kostunin
Author
ORCID : 0000-0002-0487-0076
M. Kreter
Author
ORCID : 0000-0002-3092-3506
G. Lamanna 2
Author
A. Lemière 6
Author
M. Lemoine-Goumard 9
Author
ORCID : 0000-0002-4462-3686
J.-P. Lenain 5
Author
IdHAL : jlenainORCID : 0000-0001-7284-9220IdRef : 14595921X
F. Leuschner
Author
C. Levy 5
Author
T. Lohse
Author
ORCID : 0000-0002-9751-7633
I. Lypova
Author
J. Mackey
Author
ORCID : 0000-0002-5449-6131
J. Majumdar
Author
D. Malyshev
Author
ORCID : 0000-0001-9689-2194
V. Marandon
Author
ORCID : 0000-0001-9077-4058
P. Marchegiani
Author
ORCID : 0000-0001-7487-8287
Alexandre Marcowith 8
Author
IdHAL : alexandre-marcowithORCID : 0000-0002-3971-0910IdRef : 114473609
A. Mares 9
Author
ORCID : 0000-0003-3345-7800
G. Martí-Devesa
Author
ORCID : 0000-0003-0766-6473
R. Marx
Author
ORCID : 0000-0002-6557-4924
R. Moderski
Author
L. Mohrmann
Author
ORCID : 0000-0002-9667-8654
A. Montanari 3
Author
ORCID : 0000-0002-3620-0173
C. Moore
Author
ORCID : 0000-0002-9541-6046
P. Morris
Author
ORCID : 0000-0002-8533-8232
E. Moulin 3
Author
ORCID : 0000-0003-4007-0145IdRef : 098040324
J. Muller 7
Author
ORCID : 0000-0003-1941-6615
T. Murach
Author
ORCID : 0000-0003-1128-5008
K. Nakashima
Author
A. Nayerhoda
Author
ORCID : 0000-0003-0587-4324
M. de Naurois 7
Author
ORCID : 0000-0002-7245-201X
H. Ndiyavala
Author
ORCID : 0000-0001-9279-1775
S. Ohm
Author
ORCID : 0000-0002-3474-2243
L. Olivera-Nieto
Author
ORCID : 0000-0002-9105-0518
E. de Ona Wilhelmi
Author
M. Ostrowski
Author
ORCID : 0000-0002-9199-7031
S. Panny
Author
ORCID : 0000-0001-5770-3805
M. Panter
Author
R.D. Parsons
Author
G. Peron
Author
ORCID : 0000-0003-3255-0077
M. Punch 6
Author
IdHAL : michael-punchORCID : 0000-0002-4710-2165IdRef : 15174677X
A. Quirrenbach
Author
S. Raab
Author
R. Rauth
Author
ORCID : 0000-0003-4513-8241
Matthieu Renaud 8
Author
IdHAL : matthieu-renaud2ORCID : 0000-0002-2203-4880
F. Rieger
Author
ORCID : 0000-0003-1334-2993
L. Rinchiuso 3
Author
ORCID : 0000-0003-0540-9967IdRef : 237906325
C. Romoli
Author
ORCID : 0000-0003-2541-4499
G. Rowell
Author
ORCID : 0000-0002-9516-1581
B. Rudak
Author
ORCID : 0000-0003-0452-3805
E. Ruiz-Velasco
Author
ORCID : 0000-0001-6939-7825
V. Sahakian
Author
S. Sailer
Author
ORCID : 0000-0001-8273-8495
H. Salzmann
Author
D.A. Sanchez 2
Author
A. Santangelo
Author
ORCID : 0000-0003-4187-9560
M. Sasaki
Author
ORCID : 0000-0001-5302-1866
M. Scalici
Author
J. Schäfer
Author
F. Schüssler 3
Author
ORCID : 0000-0003-1500-6571IdRef : 248085166
H.M. Schutte
Author
U. Schwanke
Author
ORCID : 0000-0002-1229-278X
M. Seglar-Arroyo 3
Author
ORCID : 0000-0001-8654-409X
M. Senniappan
Author
ORCID : 0000-0001-6734-7699
R. Steenkamp
Author
C. Stegmann
Author
S. Steinmassl
Author
ORCID : 0000-0002-2865-8563
C. Steppa
Author
ORCID : 0000-0003-0116-8836
D.J. van Der Walt
Author
C. van Eldik
Author
ORCID : 0000-0001-9669-645X
C. van Rensburg
Author
B. van Soelen
Author
ORCID : 0000-0003-1873-7855
George Vasileiadis 8
Author
IdHAL : georges-vasileiadisORCID : 0000-0002-4487-2957
J. Veh
Author
C. Venter
Author
ORCID : 0000-0002-2666-4812
P. Vincent 5
Author
J. Vink
Author
ORCID : 0000-0002-4708-4219
H.J. Völk
Author
Z. Wadiasingh
Author
ORCID : 0000-0002-9249-0515
S.J. Wagner
Author
J. Watson
Author
ORCID : 0000-0003-4282-7463
Felix Werner
Author
R. White
Author
A. Wierzcholska
Author
ORCID : 0000-0003-4472-7204
Yu Wun Wong
Author
A. Yusafzai
Author
M. Zacharias 4
Author
ORCID : 0000-0001-5801-3945
R. Zanin
Author
ORCID : 0000-0001-6320-1801
D. Zargaryan
Author
ORCID : 0000-0002-2876-6433
A.A. Zdziarski
Author
A. Zech 4
Author
ORCID : 0000-0002-4388-5625
S.J. Zhu
Author
J. Zorn
Author
ORCID : 0000-0001-9309-0700
S. Zouari 6
Author
ORCID : 0000-0002-5333-2004
N. Żywucka
Author
ORCID : 0000-0003-2644-6441
P. Evans
Author
ORCID : 0000-0002-5674-2404
K. Page
Author
Gamma-ray bursts (GRBs), which are bright flashes of gamma rays from extragalactic sources followed by fading afterglow emission, are associated with stellar core collapse events. We report the detection of very-high-energy (VHE) gamma rays from the afterglow of GRB 190829A, between 4 and 56 hours after the trigger, using the High Energy Stereoscopic System (H.E.S.S.). The low luminosity and redshift of GRB 190829A reduce both internal and external absorption, allowing determination of its intrinsic energy spectrum. Between energies of 0.18 and 3.3 tera–electron volts, this spectrum is described by a power law with photon index of 2.07 ± 0.09, similar to the x-ray spectrum. The x-ray and VHE gamma-ray light curves also show similar decay profiles. These similar characteristics in the x-ray and gamma-ray bands challenge GRB afterglow emission scenarios.
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