A. Abramowski
Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S
Abramowski, A.; Acero, F.; Aharonian, F.; Akhperjanian, A.G.; Anton, G.; Balenderan, S.; Balzer, A.; Barnacka, A.; Becherini, Y.; Becker Tjus, J.; Bernlöhr, K.; Birsin, E.; Biteau, J.; Bochow, A.; Boisson, C.; Bolmont, J.; Bordas, P.; Brucker, J.; Brun, F.; Brun, P.; Bulik, T.; Carrigan, S.; Casanova, S.; Cerruti, M.; Chadwick, P.M.; Charbonnier, A.; Chaves, R.C.G.; Cheesebrough, A.; Cologna, G.; Conrad, J.; Couturier, C.; Dalton, M.; Daniel, M.K.; Davids, I.D.; Degrange, B.; Deil, C.; deWilt, P.; Dickinson, H.J.; Djannati-Ataï, A.; Domainko, W.; Drury, L.O'C.; Dubus, G.; Dutson, K.; Dyks, J.; Dyrda, M.; Egberts, K.; Eger, P.; Espigat, P.; Fallon, L.; Farnier, C.; Fegan, S.; Feinstein, F.; Fernandes, M.V.; Fernandez, D.; Fiasson, A.; Fontaine, G.; Förster, A.; Füßling, M.; Gajdus, M.; Gallant, Y.A.; Garrigoux, T.; Gast, H.; Giebels, B.; Glicenstein, J.F.; Glück, B.; Göring, D.; Grondin, M.-H.; Häffner, S.; Hague, J.D.; Hahn, J.; Hampf, D.; Harris, J.; Heinz, S.; Heinzelmann, G.; Henri,...
Authors
F. Acero
F. Aharonian
A.G. Akhperjanian
G. Anton
S. Balenderan
A. Balzer
A. Barnacka
Y. Becherini
J. Becker Tjus
K. Bernlöhr
E. Birsin
J. Biteau
A. Bochow
C. Boisson
J. Bolmont
P. Bordas
J. Brucker
F. Brun
P. Brun
T. Bulik
S. Carrigan
S. Casanova
M. Cerruti
Professor Paula Chadwick p.m.chadwick@durham.ac.uk
Head Of Department
A. Charbonnier
R.C.G. Chaves
A. Cheesebrough
G. Cologna
J. Conrad
C. Couturier
M. Dalton
M.K. Daniel
I.D. Davids
B. Degrange
C. Deil
P. deWilt
H.J. Dickinson
A. Djannati-Ataï
W. Domainko
L.O'C. Drury
G. Dubus
K. Dutson
J. Dyks
M. Dyrda
K. Egberts
P. Eger
P. Espigat
L. Fallon
C. Farnier
S. Fegan
F. Feinstein
M.V. Fernandes
D. Fernandez
A. Fiasson
G. Fontaine
A. Förster
M. Füßling
M. Gajdus
Y.A. Gallant
T. Garrigoux
H. Gast
B. Giebels
J.F. Glicenstein
B. Glück
D. Göring
M.-H. Grondin
S. Häffner
J.D. Hague
J. Hahn
D. Hampf
J. Harris
S. Heinz
G. Heinzelmann
G. Henri
G. Hermann
A. Hillert
J.A. Hinton
W. Hofmann
P. Hofverberg
M. Holler
D. Horns
A. Jacholkowska
C. Jahn
M. Jamrozy
I. Jung
M.A. Kastendieck
K. Katarzyński
U. Katz
S. Kaufmann
B. Khélifi
D. Klochkov
W. Kluźniak
T. Kneiske
Nu Komin
K. Kosack
R. Kossakowski
F. Krayzel
H. Laffon
G. Lamanna
J.-P. Lenain
D. Lennarz
T. Lohse
A. Lopatin
C.-C. Lu
V. Marandon
A. Marcowith
J. Masbou
G. Maurin
N. Maxted
M. Mayer
T.J.L. McComb
M.C. Medina
J. Méhault
U. Menzler
R. Moderski
M. Mohamed
E. Moulin
C.L. Naumann
M. Naumann-Godo
M. de Naurois
D. Nedbal
N. Nguyen
J. Niemiec
Professor Sam Nolan s.j.nolan@durham.ac.uk
Director Of Dcad
S. Ohm
E. de Oña Wilhelmi
B. Opitz
M. Ostrowski
I. Oya
M. Panter
D. Parsons
M. Paz Arribas
N.W. Pekeur
G. Pelletier
J. Perez
P.-O. Petrucci
B. Peyaud
S. Pita
G. Pühlhofer
M. Punch
A. Quirrenbach
M. Raue
A. Reimer
O. Reimer
M. Renaud
R. de los Reyes
F. Rieger
J. Ripken
L. Rob
S. Rosier-Lees
G. Rowell
B. Rudak
C.B. Rulten
V. Sahakian
D.A. Sanchez
A. Santangelo
R. Schlickeiser
A. Schulz
U. Schwanke
S. Schwarzburg
S. Schwemmer
F. Sheidaei
J.L. Skilton
H. Sol
G. Spengler
Ł Stawarz
R. Steenkamp
C. Stegmann
F. Stinzing
K. Stycz
I. Sushch
A. Szostek
J.-P. Tavernet
R. Terrier
M. Tluczykont
K. Valerius
C. van Eldik
G. Vasileiadis
C. Venter
A. Viana
P. Vincent
H.J. Völk
F. Volpe
S. Vorobiov
M. Vorster
S.J. Wagner
Professor Martin Ward martin.ward@durham.ac.uk
External Examiner (PGR)
R. White
A. Wierzcholska
D. Wouters
M. Zacharias
A. Zajczyk
A.A. Zdziarski
A. Zech
H.-S. Zechlin
Abstract
The extragalactic background light (EBL) is the diffuse radiation with the second highest energy density in the Universe after the cosmic microwave background. The aim of this study is the measurement of the imprint of the EBL opacity to γ-rays on the spectra of the brightest extragalactic sources detected with the High Energy Stereoscopic System (H.E.S.S.). The originality of the method lies in the joint fit of the EBL optical depth and of the intrinsic spectra of the sources, assuming intrinsic smoothness. Analysis of a total of ~105γ-ray events enables the detection of an EBL signature at the 8.8σ level and constitutes the first measurement of the EBL optical depth using very-high energy (E > 100 GeV) γ-rays. The EBL flux density is constrained over almost two decades of wavelengths [0.30 μm, 17 μm] and the peak value at 1.4 μm is derived as λFλ = 15 ± 2stat ± 3sys nW m-2 sr-1.
Citation
Abramowski, A., Acero, F., Aharonian, F., Akhperjanian, A., Anton, G., Balenderan, S., …Zechlin, H. (2013). Measurement of the extragalactic background light imprint on the spectra of the brightest blazars observed with H.E.S.S. Astronomy & Astrophysics, 550, Article A4. https://doi.org/10.1051/0004-6361/201220355
Journal Article Type | Article |
---|---|
Publication Date | Feb 1, 2013 |
Deposit Date | Mar 25, 2013 |
Publicly Available Date | Jul 15, 2014 |
Journal | Astronomy and astrophysics. |
Print ISSN | 0004-6361 |
Electronic ISSN | 1432-0746 |
Publisher | EDP Sciences |
Peer Reviewed | Peer Reviewed |
Volume | 550 |
Article Number | A4 |
DOI | https://doi.org/10.1051/0004-6361/201220355 |
Keywords | Gamma rays: galaxies, Cosmic background radiation, BL Lacertae objects: general. |
Public URL | https://durham-repository.worktribe.com/output/1461704 |
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Copyright Statement
Reproduced with permission from Astronomy & Astrophysics, © ESO
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