@misc{10481/76548,
year = {2022},
month = {7},
url = {http://hdl.handle.net/10481/76548},
abstract = {Ultra-high-energy photons with energies exceeding 1017 eV offer a wealth of connections to different aspects of
cosmic-ray astrophysics as well as to gamma-ray and neutrino astronomy. The recent observations of photons with
energies in the 1015 eV range further motivate searches for even higher-energy photons. In this paper, we present a
search for photons with energies exceeding 2 × 1017 eV using about 5.5 yr of hybrid data from the low-energy
extensions of the Pierre Auger Observatory. The upper limits on the integral photon flux derived here are the most
stringent ones to date in the energy region between 1017 and 1018 eV.},
organization = {Argentina-Comision Nacional de Energia Atomica},
organization = {ANPCyT},
organization = {Argentina-Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)		
Argentina-Gobierno de la Provincia de Mendoza		
Argentina-Municipalidad de Malargue		
Argentina-NDM Holdings},
organization = {Australian Research Council},
organization = {Belgium-Fonds de la Recherche Scientifique (FNRS)},
organization = {FWO},
organization = {Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ)
Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF)		
Brazil-Financiadora de Estudos e Projetos (FINEP)		
Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio De Janeiro (FAPERJ)		
Brazil-Sao Paulo Research Foundation (FAPESP)	2019/10151-2	
2010/07359-6	
1999/05404-3	
Brazil-Ministerio da Ciencia, Tecnologia, Inovacoes e Comunicacoes (MCTIC)},
organization = {France-Centre de Calcul IN2P3/CNRS		
Centre National de la Recherche Scientifique (CNRS)		
France-Conseil Regional Ile-deFrance		
France-Departement Physique Nucleaire et Corpusculaire (PNC-IN2P3/CNRS)		
France-Departement Sciences de l'Univers (SDU-INSU/CNRS)		
France-Institut Lagrange de Paris (ILP)	LABEX ANR-10-LABX-63	
ANR-11-IDEX-0004-02},
organization = {Federal Ministry of Education & Research (BMBF)		
German Research Foundation (DFG)		
Germany-Finanzministerium Baden-Wurttemberg		
Germany-Helmholtz Alliance for Astroparticle Physics (HAP)		
Germany-Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)		
Germany-Ministerium fur Innovation, Wissenschaft und Forschung des Landes Nordrhein-Westfalen		
Germany-Ministerium fur Wissenschaft, Forschung und Kunst des Landes Baden-Wurttemberg},
organization = {Italy-Istituto Nazionale di Fisica Nucleare (INFN)		
Italy-Istituto Nazionale di Astrofisica (INAF)		
Italy-Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)		
Italy-CETEMPS Center of Excellence		
Italy-Ministero degli Affari Esteri (MAE)},
organization = {Consejo Nacional de Ciencia y Tecnologia (CONACyT)	167733},
organization = {Mexico-Universidad Nacional Autonoma de Mexico (UNAM)		
Mexico-PAPIIT DGAPA-UNAM},
organization = {The Netherlands-Ministry of Education, Culture and Science		
The Netherlands-Netherlands Organisation for Scientific Research (NWO)		
The Netherlands-Dutch national e-infrastructure		
The Netherlands-SURF Cooperative},
organization = {Poland -Ministry of Education and Science	DIR/WK/2018/11	
Poland -National Science Centre	2016/22/M/ST9/00198	
2016/23/B/ST9/01635	
2020/39/B/ST9/01398},
organization = {Portuguese Foundation for Science and Technology		
Portugal-FEDER funds within Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia (COMPETE)},
organization = {Romania-Ministry of Research, Innovation and Digitization, CNCS/CCCDI-UEFISCDI, within PNCDI III	PN19150201/16N/2019	
PN1906010	
TE128	
PED289},
organization = {Slovenian Research Agency - Slovenia	P1-0031	
P1-0385	
I0-0033	
N1-0111},
organization = {Spanish Government	FPA2017-85114-P	
PID-2019104676GB-C32},
organization = {Spain-Xunta de Galicia	ED431C 2017/07	
Spain-Junta de Andalucia Feder Funds	SOMM17/6104/UGR	
P18-FR-4314	
Spain-RENATA Red Nacional Tematica de Astroparticulas	FPA2015-68783-REDT	
Spain-Maria de Maeztu Unit of Excellence	MDM-2016-0692},
organization = {United States Department of Energy (DOE)	DE-AC02-07CH11359	
DE-FR02-04ER41300	
DE-FG02-99ER41107	
DE-SC0011689},
organization = {National Science Foundation (NSF)	0450696},
organization = {USA-Grainger Foundation		
USA-Marie Curie-IRSES/EPLANET		
USA-European Particle Physics Latin American Network		
USA-UNESCO},
organization = {Argentina-Valle Las Lenas		
MSMT CR LTT18004	
LM2015038	
LM2018102	
CZ.02.1.01/0.0/0.0/16_013/0001402	
CZ.02.1.01/0.0/0.0/18_046/0016010	
CZ.02.1.01/0.0/0.0/17_049/0008422},
publisher = {American Astronomical Society},
title = {A Search for Photons with Energies Above 2 x 10(17) eV Using Hybrid Data from the Low-Energy Extensions of the Pierre Auger Observatory},
doi = {10.3847/1538-4357/ac7393},
author = {Abreu, P. and Bueno Villar, Antonio and Pierre Auger Collaboration},
}