New constraints on the Mid-IR EBL from the HESS discovery of VHE gamma rays from 1ES 0229+200
F. Aharonian
,
A.G. Akhperjanian
,
U. Barres de Almeida
,
A.R. Bazer-Bachi
(1)
,
B. Behera
,
M. Beilicke
,
W. Benbow
,
K. Bernlohr
,
C. Boisson
(2)
,
O. Bolz
,
V. Borrel
(1)
,
I. Braun
,
E. Brion
(3)
,
A.M. Brown
,
R. Buhler
,
T. Bulik
,
I. Busching
,
T. Boutelier
(4)
,
S. Carrigan
,
P.M. Chadwick
,
L.-M. Chounet
(5)
,
A.C. Clapson
,
G. Coignet
(6)
,
R. Cornils
,
L. Costamante
,
M. Dalton
,
B. Degrange
(5)
,
H.J. Dickinson
,
A. Djannati-Atai
(7)
,
W. Domainko
,
L.O'C. Drury
,
F. Dubois
,
G. Dubus
(4)
,
J. Dyks
,
K. Egberts
,
D. Emmanoulopoulos
,
P. Espigat
(7)
,
C. Farnier
(8)
,
F. Feinstein
(8)
,
A. Fiasson
(8)
,
A. Forster
,
G. Fontaine
(5)
,
Seb. Funk
,
M. Fusling
,
Y.A. Gallant
(8)
,
B. Giebels
(5)
,
J.F. Glicenstein
(3)
,
B. Gluck
,
P. Goret
(3)
,
C. Hadjichristidis
,
D. Hauser
,
M. Hauser
,
G. Heinzelmann
,
G. Henri
(4)
,
G. Hermann
,
J.A. Hinton
,
A. Hoffmann
,
W. Hofmann
,
M. Holleran
,
S. Hoppe
,
D. Horns
,
A. Jacholkowska
(8)
,
O.C. de Jager
,
I. Jung
,
K. Katarzynski
,
E. Kendziorra
,
M. Kerschhaggl
,
B. Khelifi
(5)
,
D. Keogh
,
Nu. Komin
(8)
,
K. Kosack
,
G. Lamanna
(6)
,
I.J. Latham
,
A. Lemiere
(7)
,
M. Lemoine-Goumard
(5)
,
J.-P. Lenain
(2)
,
T. Lohse
,
J.M. Martin
(2)
,
O. Martineau-Huynh
(9)
,
A. Marcowith
(8)
,
C. Masterson
,
D. Maurin
(9)
,
G. Maurin
(7)
,
T.J.L. Mccomb
,
R. Moderski
,
Emmanuel Moulin
(3)
,
M. de Naurois
(9)
,
D. Nedbal
,
S.J. Nolan
,
S. Ohm
,
J.-P. Olive
(1)
,
E. de Ona Wilhelmi
(7)
,
K.J. Orford
,
J.L. Osborne
,
M. Ostrowski
,
M. Panter
,
G. Pedaletti
,
G. Pelletier
(4)
,
P.-O. Petrucci
(4)
,
S. Pita
(10)
,
G. Puhlhofer
,
M. Punch
(10)
,
S. Ranchon
(6)
,
B.C. Raubenheimer
,
M. Raue
,
S.M. Rayner
,
M. Renaud
,
J. Ripken
,
L. Rob
,
L. Rolland
(3)
,
S. Rosier-Lees
(6)
,
G. Rowell
,
B. Rudak
,
J. Ruppel
,
V. Sahakian
,
A. Santangelo
,
R. Schlickeiser
,
F. Schock
,
R. Schroder
,
U. Schwanke
,
S. Schwarzburg
,
S. Schwemmer
,
A. Shalchi
,
H. Sol
(2)
,
D. Spangler
,
L. Stawarz
,
R. Steenkamp
,
C. Stegmann
,
G. Superina
(5)
,
P.H. Tam
,
J.-P. Tavernet
(9)
,
R. Terrier
(10)
,
C. van Eldik
,
G. Vasileiadis
(8)
,
C. Venter
,
J.P. Vialle
(6)
,
P. Vincent
(9)
,
M. Vivier
(3)
,
H.J. Volk
,
F. Volpe
(5)
,
S.J. Wagner
,
M. Ward
,
A.A. Zdziarski
,
A. Zech
(2)
1
CESR -
Centre d'étude spatiale des rayonnements
2 LUTH (UMR_8102) - Laboratoire Univers et Théories
3 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
4 LAOG - Laboratoire d'Astrophysique de Grenoble
5 LLR - Laboratoire Leprince-Ringuet
6 LAPP - Laboratoire d'Annecy de Physique des Particules
7 APC (UMR_7164) - AstroParticule et Cosmologie
8 LPTA - Laboratoire de Physique Théorique et Astroparticules
9 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
10 APC - AHE - APC - Astrophysique des Hautes Energies
2 LUTH (UMR_8102) - Laboratoire Univers et Théories
3 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
4 LAOG - Laboratoire d'Astrophysique de Grenoble
5 LLR - Laboratoire Leprince-Ringuet
6 LAPP - Laboratoire d'Annecy de Physique des Particules
7 APC (UMR_7164) - AstroParticule et Cosmologie
8 LPTA - Laboratoire de Physique Théorique et Astroparticules
9 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
10 APC - AHE - APC - Astrophysique des Hautes Energies
F. Aharonian
- Function : Author
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A.G. Akhperjanian
- Function : Author
U. Barres de Almeida
- Function : Author
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B. Behera
- Function : Author
M. Beilicke
- Function : Author
W. Benbow
- Function : Author
K. Bernlohr
- Function : Author
C. Boisson
- Function : Author
- PersonId : 755462
- ORCID : 0000-0001-5893-1797
O. Bolz
- Function : Author
I. Braun
- Function : Author
A.M. Brown
- Function : Author
R. Buhler
- Function : Author
T. Bulik
- Function : Author
I. Busching
- Function : Author
S. Carrigan
- Function : Author
P.M. Chadwick
- Function : Author
A.C. Clapson
- Function : Author
R. Cornils
- Function : Author
L. Costamante
- Function : Author
M. Dalton
- Function : Author
H.J. Dickinson
- Function : Author
W. Domainko
- Function : Author
L.O'C. Drury
- Function : Author
G. Dubus
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J. Dyks
- Function : Author
K. Egberts
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D. Emmanoulopoulos
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A. Fiasson
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A. Forster
- Function : Author
Seb. Funk
- Function : Author
M. Fusling
- Function : Author
B. Gluck
- Function : Author
C. Hadjichristidis
- Function : Author
D. Hauser
- Function : Author
M. Hauser
- Function : Author
G. Heinzelmann
- Function : Author
G. Hermann
- Function : Author
J.A. Hinton
- Function : Author
A. Hoffmann
- Function : Author
W. Hofmann
- Function : Author
M. Holleran
- Function : Author
S. Hoppe
- Function : Author
D. Horns
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O.C. de Jager
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I. Jung
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K. Katarzynski
- Function : Author
E. Kendziorra
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M. Kerschhaggl
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B. Khelifi
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D. Keogh
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Nu. Komin
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K. Kosack
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I.J. Latham
- Function : Author
M. Lemoine-Goumard
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J.-P. Lenain
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T. Lohse
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A. Marcowith
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C. Masterson
- Function : Author
D. Maurin
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- IdHAL : david-maurin
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T.J.L. Mccomb
- Function : Author
R. Moderski
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Emmanuel Moulin
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M. de Naurois
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D. Nedbal
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S.J. Nolan
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S. Ohm
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K.J. Orford
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J.L. Osborne
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M. Ostrowski
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M. Panter
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G. Pedaletti
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P.-O. Petrucci
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G. Puhlhofer
- Function : Author
M. Punch
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B.C. Raubenheimer
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M. Raue
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S.M. Rayner
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M. Renaud
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J. Ripken
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L. Rob
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L. Rolland
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G. Rowell
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B. Rudak
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J. Ruppel
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V. Sahakian
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A. Santangelo
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R. Schlickeiser
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F. Schock
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R. Schroder
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U. Schwanke
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S. Schwarzburg
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S. Schwemmer
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A. Shalchi
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D. Spangler
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L. Stawarz
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R. Steenkamp
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C. Stegmann
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P.H. Tam
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C. van Eldik
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C. Venter
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H.J. Volk
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S.J. Wagner
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M. Ward
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A.A. Zdziarski
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A. Zech
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Abstract
Aims:To investigate the very high energy (VHE: >100 GeV) γ-ray emission from the high-frequency peaked BL Lac 1ES 0229+200. Methods: Observations of 1ES 0229+200 at energies above 580 GeV were performed with the High Energy Stereoscopic System (HESS) in 2005 and 2006. Results: 1ES 0229+200 is discovered by HESS to be an emitter of VHE photons. A signal is detected at the 6.6σ level in the HESS observations (41.8 h live time). The integral flux above 580 GeV is (9.4±1.5_stat±1.9_syst) × 10-13 cm-2 s-1, corresponding to ~1.8% of the flux observed from the Crab Nebula. The data show no evidence for significant variability on any time scale. The observed spectrum is characterized by a hard power law (Γ = 2.50±0.19_stat±0.10_syst) from 500 GeV to ~15 TeV. Conclusions: The high-energy range and hardness of the observed spectrum, coupled with the object's relatively large redshift (z = 0.1396), enable the strongest constraints so far on the density of the Extragalactic Background Light (EBL) in the mid-infrared band. Assuming that the emitted spectrum is not harder than Γ_int ≈ 1.5, the HESS data support an EBL spectrum ∝λ-1 and density close to the lower limit from source counts measured by Spitzer, confirming the previous indications from the HEGRA data of 1ES 1426+428 (z=0.129). Irrespective of the EBL models used, the intrinsic spectrum of 1ES 0229+200 is hard, thus locating the high-energy peak of its spectral energy distribution above a few TeV.