Upper limit on the cosmic-ray photon fraction at EeV energies from the Pierre Auger Observatory
J. Abraham
,
P. Abreu
,
M. Aglietta
,
C. Aguirre
,
E.J. Ahn
,
D. Allard
(1)
,
I. Allekotte
,
J. Allen
,
P. Allison
,
J. Alvarez-Muniz
,
M. Ambrosio
,
L. Anchordoqui
,
S. Andringa
,
A. Anzalone
,
C. Aramo
,
S. Argiro
,
K. Arisaka
,
F. Arneodo
,
F. Arqueros
,
T. Asch
,
H. Asorey
,
P. Assis
,
J. Aublin
(2)
,
M. Ave
,
G. Avila
,
T. Bäcker
,
D. Badagnani
,
K.B. Barber
,
A.F. Barbosa
,
S.L.C. Barroso
,
B. Baughman
,
P. Bauleo
,
J.J. Beatty
,
T. Beau
(3)
,
B.R. Becker
,
K.H. Becker
,
A. Bellétoile
(4)
,
J.A. Bellido
,
S. Benzvi
,
C. Berat
(4)
,
P. Bernardini
,
X. Bertou
,
P.L. Biermann
,
P. Billoir
(2)
,
O. Blanch-Bigas
(2)
,
F. Blanco
,
C. Bleve
,
H. Blümer
,
M. Bohacova
,
C. Bonifazi
(2)
,
R. Bonino
,
J. Brack
,
P. Brogueira
,
W.C. Brown
,
R. Bruijn
,
P. Buchholz
,
A. Bueno
,
R.E. Burton
,
N.G. Busca
(3)
,
K.S. Caballero-Mora
,
L. Caramete
,
R. Caruso
,
W. Carvalho
,
A. Castellina
,
O. Catalano
,
L. Cazon
,
R. Cester
,
J. Chauvin
(4)
,
A. Chiavassa
,
J.A. Chinellato
,
A. Chou
,
J. Chudoba
,
J. Chye
,
R.W. Clay
,
E. Colombo
,
R. Conceiçao
,
B. Connolly
,
F. Contreras
,
J. Coppens
,
A. Cordier
(5)
,
U. Cotti
,
S. Coutu
,
C.E. Covault
,
A. Creusot
,
A. Criss
,
J. Cronin
,
A. Curutiu
,
S. Dagoret-Campagne
(5)
,
K. Daumiller
,
B.R. Dawson
,
R.M. de Almeida
,
M. de Domenico
,
C. de Donato
,
S.J. de Jong
,
G. de La Vega
,
W.J.M. de Mello Junior
,
J.R.T. de Mello Neto
,
I. de Mitri
,
V. de Souza
,
G. Decerprit
(3)
,
L. del Peral
,
O. Deligny
(6)
,
A. Della Selva
,
C. Delle Fratte
,
H. Dembinski
,
C. Di Giulio
,
J.C. Diaz
,
P.N. Diep
,
C. Dobrigkeit
,
J.C. d'Olivo
,
P.N. Dong
,
D. Dornic
(6)
,
A. Dorofeev
,
J.C. dos Anjos
,
M.T. Dova
,
D. d'Urso
,
I. Dutan
,
M.A. Duvernois
,
R. Engel
,
M. Erdmann
,
C.O. Escobar
,
A. Etchegoyen
,
P. Facal San Luis
,
H. Falcke
,
G. Farrar
,
A.C. Fauth
,
N. Fazzini
,
F. Ferrer
,
A. Ferrero
,
B. Fick
,
A. Filevich
,
A. Filipcic
,
I. Fleck
,
S. Fliescher
,
C.E. Fracchiolla
,
E.D. Fraenkel
,
W. Fulgione
,
R.F. Gamarra
,
S. Gambetta
,
B. Garcia
,
D. Garcia Gamez
,
D. Garcia-Pinto
,
X. Garrido
(5)
,
G. Gelmini
,
H. Gemmeke
,
P.L. Ghia
,
U. Giaccari
,
M. Giller
,
H. Glass
,
L.M. Goggin
,
M.S. Gold
,
G. Golup
,
F. Gomez
,
M. Gomez Berisso
,
Paulo Gonçalves
,
M. Gonçalves Do Amaral
,
D. Gonzalez
,
J.G. Gonzalez
,
D. Gora
,
A. Gorgi
,
P. Gouffon
,
S. Grebe
,
M. Grigat
,
A.F. Grillo
,
Y. Guardincerri
,
F. Guarino
,
G.P. Guedes
,
J. Gutiérrez
,
J.D. Hague
,
V. Halenka
,
P. Hansen
,
D. Harari
,
S. Harmsma
,
J.L. Harton
,
A. Haungs
,
M.D. Healy
,
T. Hebbeker
,
G. Hebrero
,
D. Heck
,
C. Hojvat
,
V.C. Holmes
,
P. Homola
,
J.R. Hörandel
,
A. Horneffer
,
M. Hrabovsky
,
T. Huege
,
M. Hussain
,
M. Iarlori
,
A. Insolia
,
F. Ionita
,
A. Italiano
,
S. Jiraskova
,
M. Kaducak
(6)
,
K.H. Kampert
,
T. Karova
,
P. Kasper
(6)
,
Balázs Kégl
(5)
,
B. Keilhauer
,
E. Kemp
,
R.M. Kieckhafer
,
H.O. Klages
,
M. Kleifges
,
J. Kleinfeller
,
R. Knapik
,
J. Knapp
,
D.H. Koang
(4)
,
A. Krieger
,
O. Krömer
,
D. Kruppke
,
D. Kuempel
,
N. Kunka
,
A. Kusenko
,
G. La Rosa
,
C. Lachaud
(1)
,
B.L. Lago
,
M.S.A.B. Leao
,
D. Lebrun
(4)
,
P. Lebrun
(6)
,
J. R. Lee
,
M.A. Leigui de Oliveira
,
A. Lemiere
(6)
,
A. Letessier-Selvon
(2)
,
M. Leuthold
,
I. Lhenry-Yvon
,
R. Lopez
,
A. Lopez Agüera
,
J. Lozano Bahilo
,
A. Lucero
,
R. Luna Garcia
,
M.C. Maccarone
,
C. Macolino
,
S. Maldera
,
D. Mandat
,
P. Mantsch
,
A.G. Mariazzi
,
I.C. Maris
,
H.R. Marquez Falcon
,
D. Martello
,
Jose Martinez
,
O. Martinez Bravo
,
H.J. Mathes
,
J. Matthews
,
J.A.J. Matthews
,
G. Matthiae
,
D. Maurizio
,
P.O. Mazur
,
M. Mcewen
,
R.R. Mcneil
,
G. Medina-Tanco
,
M. Melissas
,
D. Melo
,
E. Menichetti
,
A. Menshikov
,
R. Meyhandan
,
M.I. Micheletti
,
G. Miele
,
W. Miller
,
L. Miramonti
,
S. Mollerach
,
M. Monasor
,
D. Monnier Ragaigne
(5)
,
F. Montanet
(4)
,
B. Morales
,
C. Morello
,
J.C. Moreno
,
C. Morris
,
M. Mostafa
,
S. Mueller
,
M.A. Muller
,
R. Mussa
,
G. Navarra
,
J.L. Navarro
,
S. Navas
,
P. Necesal
,
L. Nellen
,
C. Newman-Holmes
(6)
,
D. Newton
,
P.T. Nhung
,
N. Nierstenhoefer
,
D. Nitz
,
D. Nosek
,
L. Nozka
,
J. Oehlschläger
,
A. Olinto
,
V.M. Olmos-Gilbaja
,
M. Ortiz
,
F. Ortolani
,
N. Pacheco
,
D. Pakk Selmi-Dei
,
M. Palatka
,
J. Pallotta
,
G. Parente
,
E. Parizot
(1)
,
S. Parlati
,
S. Pastor
,
M. Patel
,
T. Paul
,
V. Pavlidou
,
K. Payet
(4)
,
M. Pech
,
J. Pekala
,
R. Pelayo
,
I.M. Pepe
,
L. Perrone
,
R. Pesce
,
E. Petermann
,
S. Petrera
,
P. Petrinca
,
A. Petrolini
,
Y. Petrov
,
J. Petrovic
,
C. Pfendner
,
A. Pichel
,
R. Piegaia
,
T. Pierog
,
M. Pimenta
,
T. Pinto
,
V. Pirronello
,
O. Pisanti
,
M. Platino
,
J. Pochon
,
V.H. Ponce
,
M. Pontz
,
P. Privitera
,
M. Prouza
,
E.J. Quel
,
J. Rautenberg
,
D. Ravignani
,
A. Redondo
,
S. Reucroft
,
Benoît Revenu
(7)
,
F.A.S. Rezende
,
J. Ridky
,
S. Riggi
,
M. Risse
,
C. Rivière
(4)
,
V. Rizi
,
C. Robledo
,
G. Rodriguez
,
J. Rodriguez Martino
,
J. Rodriguez Rojo
,
I. Rodriguez-Cabo
,
M.D. Rodriguez-Frias
,
G. Ros
,
J. Rosado
,
M. Roth
,
B. Rouillé-d'Orfeuil
(3)
,
E. Roulet
,
A.C. Rovero
,
F. Salamida
,
H. Salazar
,
G. Salina
,
F. Sanchez
,
M. Santander
,
C.E. Santo
,
E.M. Santos
,
F. Sarazin
,
S. Sarkar
,
R. Sato
,
N. Scharf
,
V. Scherini
,
H. Schieler
,
P. Schiffer
,
A. Schmidt
,
F. Schmidt
,
T. Schmidt
,
O. Scholten
,
H. Schoorlemmer
,
J. Schovancova
,
P. Schovanek
,
F. Schroeder
,
S. Schulte
,
F. Schüssler
,
D. Schuster
,
S.J. Sciutto
,
M. Scuderi
,
A. Segreto
,
D.V. Semikoz
(8)
,
M. Settimo
,
R.C. Shellard
,
I. Sidelnik
,
B.B. Siffert
,
N. Smetniansky de Grande
,
A. Smia Lkowski
,
R. Smida
,
B.E. Smith
,
G.R. Snow
,
P. Sommers
,
J. Sorokin
,
H. Spinka
,
R. Squartini
,
E. Strazzeri
,
A. Stutz
(4)
,
F. Suarez
,
T. Suomijärvi
,
A.D. Supanitsky
,
M.S. Sutherland
,
J. Swain
,
Z. Szadkowski
,
A. Tamashiro
,
A. Tamburro
,
T. Tarutina
,
O. Tascau
,
R. Tcaciuc
,
D. Tcherniakhovski
,
N.T. Thao
,
D. Thomas
,
R. Ticona
,
J. Tiffenberg
,
C. Timmermans
,
W. Tkaczyk
,
C.J. Todero Peixoto
,
B. Tomé
,
A. Tonachini
,
I. Torres
,
P. Travnicek
,
D.B. Tridapalli
,
G. Tristram
(3)
,
E. Trovato
,
V. Tuci
,
M. Tueros
,
R. Ulrich
,
M. Unger
,
Martin Urban
(5)
,
J.F. Valdés Galicia
,
I. Valino
,
L. Valore
,
A.M. van den Berg
,
R.A. Vazquez
,
D. Veberic
,
A. Velarde
,
T. Venters
,
V. Verzi
,
M. Videla
,
L. Villasenor
,
S. Vorobiov
,
L. Voyvodic
(6)
,
H. Wahlberg
,
P. Wahrlich
,
O. Wainberg
,
D. Warner
,
A.A. Watson
,
S. Westerhoff
,
B.J. Whelan
,
G. Wieczorek
,
L. Wiencke
,
B. Wilczynska
,
H. Wilczynski
,
C. Wileman
,
M.G. Winnick
,
H. Wu
(5)
,
B. Wundheiler
,
P. Younk
,
G. Yuan
,
E. Zas
,
D. Zavrtanik
,
M. Zavrtanik
,
I. Zaw
,
A. Zepeda
,
M. Ziolkowski
1
APC - AHE -
APC - Astrophysique des Hautes Energies
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 APC (UMR_7164) - AstroParticule et Cosmologie
4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
5 LAL - Laboratoire de l'Accélérateur Linéaire
6 IPNO - Institut de Physique Nucléaire d'Orsay
7 SUBATECH - Laboratoire SUBATECH Nantes
8 APC - THEORIE
2 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
3 APC (UMR_7164) - AstroParticule et Cosmologie
4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
5 LAL - Laboratoire de l'Accélérateur Linéaire
6 IPNO - Institut de Physique Nucléaire d'Orsay
7 SUBATECH - Laboratoire SUBATECH Nantes
8 APC - THEORIE
J. Abraham
- Function : Author
P. Abreu
- Function : Author
M. Aglietta
- Function : Author
C. Aguirre
- Function : Author
E.J. Ahn
- Function : Author
D. Allard
- Function : Author
- PersonId : 1185888
- IdHAL : denis-allard
I. Allekotte
- Function : Author
J. Allen
- Function : Author
P. Allison
- Function : Author
J. Alvarez-Muniz
- Function : Author
M. Ambrosio
- Function : Author
L. Anchordoqui
- Function : Author
S. Andringa
- Function : Author
A. Anzalone
- Function : Author
C. Aramo
- Function : Author
S. Argiro
- Function : Author
K. Arisaka
- Function : Author
F. Arneodo
- Function : Author
F. Arqueros
- Function : Author
T. Asch
- Function : Author
H. Asorey
- Function : Author
P. Assis
- Function : Author
M. Ave
- Function : Author
G. Avila
- Function : Author
T. Bäcker
- Function : Author
D. Badagnani
- Function : Author
K.B. Barber
- Function : Author
A.F. Barbosa
- Function : Author
S.L.C. Barroso
- Function : Author
B. Baughman
- Function : Author
P. Bauleo
- Function : Author
J.J. Beatty
- Function : Author
B.R. Becker
- Function : Author
K.H. Becker
- Function : Author
J.A. Bellido
- Function : Author
S. Benzvi
- Function : Author
C. Berat
- Function : Author
- PersonId : 739578
- IdHAL : corinne-berat
- ORCID : 0000-0001-8294-6294
- IdRef : 033505187
P. Bernardini
- Function : Author
X. Bertou
- Function : Author
P.L. Biermann
- Function : Author
F. Blanco
- Function : Author
C. Bleve
- Function : Author
H. Blümer
- Function : Author
M. Bohacova
- Function : Author
R. Bonino
- Function : Author
J. Brack
- Function : Author
P. Brogueira
- Function : Author
W.C. Brown
- Function : Author
R. Bruijn
- Function : Author
P. Buchholz
- Function : Author
A. Bueno
- Function : Author
R.E. Burton
- Function : Author
K.S. Caballero-Mora
- Function : Author
L. Caramete
- Function : Author
R. Caruso
- Function : Author
W. Carvalho
- Function : Author
A. Castellina
- Function : Author
O. Catalano
- Function : Author
L. Cazon
- Function : Author
R. Cester
- Function : Author
A. Chiavassa
- Function : Author
J.A. Chinellato
- Function : Author
A. Chou
- Function : Author
J. Chudoba
- Function : Author
J. Chye
- Function : Author
R.W. Clay
- Function : Author
E. Colombo
- Function : Author
- PersonId : 758997
- ORCID : 0000-0002-3700-3745
R. Conceiçao
- Function : Author
B. Connolly
- Function : Author
F. Contreras
- Function : Author
J. Coppens
- Function : Author
U. Cotti
- Function : Author
S. Coutu
- Function : Author
C.E. Covault
- Function : Author
A. Creusot
- Function : Author
A. Criss
- Function : Author
J. Cronin
- Function : Author
A. Curutiu
- Function : Author
S. Dagoret-Campagne
- Function : Author
- PersonId : 739894
- IdHAL : sylvie-dagoret-campagne
- ORCID : 0000-0003-1131-7030
- IdRef : 165927119
K. Daumiller
- Function : Author
B.R. Dawson
- Function : Author
R.M. de Almeida
- Function : Author
M. de Domenico
- Function : Author
C. de Donato
- Function : Author
S.J. de Jong
- Function : Author
G. de La Vega
- Function : Author
W.J.M. de Mello Junior
- Function : Author
J.R.T. de Mello Neto
- Function : Author
I. de Mitri
- Function : Author
V. de Souza
- Function : Author
L. del Peral
- Function : Author
A. Della Selva
- Function : Author
C. Delle Fratte
- Function : Author
H. Dembinski
- Function : Author
C. Di Giulio
- Function : Author
J.C. Diaz
- Function : Author
P.N. Diep
- Function : Author
C. Dobrigkeit
- Function : Author
J.C. d'Olivo
- Function : Author
P.N. Dong
- Function : Author
A. Dorofeev
- Function : Author
J.C. dos Anjos
- Function : Author
M.T. Dova
- Function : Author
D. d'Urso
- Function : Author
I. Dutan
- Function : Author
M.A. Duvernois
- Function : Author
R. Engel
- Function : Author
M. Erdmann
- Function : Author
C.O. Escobar
- Function : Author
A. Etchegoyen
- Function : Author
P. Facal San Luis
- Function : Author
H. Falcke
- Function : Author
G. Farrar
- Function : Author
A.C. Fauth
- Function : Author
N. Fazzini
- Function : Author
F. Ferrer
- Function : Author
A. Ferrero
- Function : Author
B. Fick
- Function : Author
A. Filevich
- Function : Author
A. Filipcic
- Function : Author
I. Fleck
- Function : Author
S. Fliescher
- Function : Author
C.E. Fracchiolla
- Function : Author
E.D. Fraenkel
- Function : Author
W. Fulgione
- Function : Author
R.F. Gamarra
- Function : Author
S. Gambetta
- Function : Author
B. Garcia
- Function : Author
D. Garcia Gamez
- Function : Author
D. Garcia-Pinto
- Function : Author
G. Gelmini
- Function : Author
H. Gemmeke
- Function : Author
P.L. Ghia
- Function : Author
U. Giaccari
- Function : Author
M. Giller
- Function : Author
H. Glass
- Function : Author
L.M. Goggin
- Function : Author
M.S. Gold
- Function : Author
G. Golup
- Function : Author
F. Gomez
- Function : Author
M. Gomez Berisso
- Function : Author
Paulo Gonçalves
- Function : Author
- PersonId : 6491
- IdHAL : paulo-goncalves
- ORCID : 0000-0002-1781-6159
- IdRef : 061093645
M. Gonçalves Do Amaral
- Function : Author
D. Gonzalez
- Function : Author
J.G. Gonzalez
- Function : Author
D. Gora
- Function : Author
A. Gorgi
- Function : Author
P. Gouffon
- Function : Author
S. Grebe
- Function : Author
M. Grigat
- Function : Author
A.F. Grillo
- Function : Author
Y. Guardincerri
- Function : Author
F. Guarino
- Function : Author
G.P. Guedes
- Function : Author
J. Gutiérrez
- Function : Author
J.D. Hague
- Function : Author
V. Halenka
- Function : Author
P. Hansen
- Function : Author
D. Harari
- Function : Author
S. Harmsma
- Function : Author
J.L. Harton
- Function : Author
A. Haungs
- Function : Author
M.D. Healy
- Function : Author
T. Hebbeker
- Function : Author
G. Hebrero
- Function : Author
D. Heck
- Function : Author
C. Hojvat
- Function : Author
V.C. Holmes
- Function : Author
P. Homola
- Function : Author
J.R. Hörandel
- Function : Author
A. Horneffer
- Function : Author
M. Hrabovsky
- Function : Author
T. Huege
- Function : Author
M. Hussain
- Function : Author
M. Iarlori
- Function : Author
A. Insolia
- Function : Author
F. Ionita
- Function : Author
A. Italiano
- Function : Author
S. Jiraskova
- Function : Author
K.H. Kampert
- Function : Author
T. Karova
- Function : Author
B. Keilhauer
- Function : Author
E. Kemp
- Function : Author
R.M. Kieckhafer
- Function : Author
H.O. Klages
- Function : Author
M. Kleifges
- Function : Author
J. Kleinfeller
- Function : Author
R. Knapik
- Function : Author
J. Knapp
- Function : Author
A. Krieger
- Function : Author
O. Krömer
- Function : Author
D. Kruppke
- Function : Author
D. Kuempel
- Function : Author
N. Kunka
- Function : Author
A. Kusenko
- Function : Author
G. La Rosa
- Function : Author
B.L. Lago
- Function : Author
M.S.A.B. Leao
- Function : Author
J. R. Lee
- Function : Author
M.A. Leigui de Oliveira
- Function : Author
A. Letessier-Selvon
- Function : Author
- PersonId : 739493
- IdHAL : antoine-letessier-selvon
- ORCID : 0000-0002-2044-3103
- IdRef : 089440757
M. Leuthold
- Function : Author
I. Lhenry-Yvon
- Function : Author
R. Lopez
- Function : Author
A. Lopez Agüera
- Function : Author
J. Lozano Bahilo
- Function : Author
A. Lucero
- Function : Author
R. Luna Garcia
- Function : Author
M.C. Maccarone
- Function : Author
C. Macolino
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S. Maldera
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D. Mandat
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P. Mantsch
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A.G. Mariazzi
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I.C. Maris
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H.R. Marquez Falcon
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D. Martello
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Jose Martinez
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O. Martinez Bravo
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H.J. Mathes
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J. Matthews
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J.A.J. Matthews
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G. Matthiae
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D. Maurizio
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P.O. Mazur
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M. Mcewen
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R.R. Mcneil
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M. Melissas
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A. Menshikov
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M. Pech
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V. Pirronello
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O. Pisanti
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A. Redondo
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S. Reucroft
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Benoît Revenu
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F.A.S. Rezende
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J. Ridky
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Abstract
From direct observations of the longitudinal development of ultra-high energy air showers performed with the Pierre Auger Observatory, upper limits of 3.8%, 2.4%, 3.5% and 11.7% (at 95% c.l.) are obtained on the fraction of cosmic-ray photons above 2, 3, 5 and 10 EeV (1 EeV = 10^18 eV) respectively. These are the first experimental limits on ultra-high energy photons at energies below 10 EeV. The results complement previous constraints on top-down models from array data and they reduce systematic uncertainties in the interpretation of shower data in terms of primary flux, nuclear composition and proton-air cross-section.
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