Journal
PHYSICAL REVIEW D
Volume 90, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.122005
Keywords
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Funding
- Comision Nacional de Energia Atomica
- Fundacion Antorchas
- Gobierno De La Provincia de Mendoza
- Municipalidad de Malargue
- NDM Holdings
- Valle Las Lenas
- Australian Research Council
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Financiadora de Estudos e Projetos (FINEP)
- Fundacao de Amparo a Pesquisa do Estado de Rio de Janeiro (FAPERJ)
- Sao Paulo Research Foundation (FAPESP) [2010/07359-6, 1999/05404-3]
- Ministerio de Ciencia e Tecnologia (MCT), Brazil
- Czech Science Foundation, Czech Republic [14-17501S]
- Centre de Calcul IN2P3/CNRS
- Centre National de la Recherche Scientifique (CNRS)
- Conseil Regional Ile-de-France
- Departement Physique Nucleaire et Corpusculaire (PNC-IN2P3/CNRS)
- Departement Sciences de l'Univers (SDU-INSU/CNRS)
- Institut Lagrange de Paris
- ILP LABEX within the Investissements d'Avenir Programme, France [ANR-10-LABX-63, ANR-11-IDEX-0004-02]
- Bundesministerium fur Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Finanzministerium Baden-Wurttemberg
- Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)
- Ministerium fur Wissenschaft und Forschung
- Nordrhein Westfalen
- Ministerium fur Wissenschaft
- Forschung und Kunst
- Baden-Wurttemberg, Germany
- Istituto Nazionale di Fisica Nucleare (INFN)
- Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR)
- Gran Sasso Center for Astroparticle Physics (CFA)
- CETEMPS Center of Excellence, Italy
- Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico
- Ministerie van Onderwijs, Cultuur en Wetenschap
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands
- National Centre for Research and Development [ERA-NET-ASPERA/01/11, ERA-NET-ASPERA/02/11]
- National Science Centre, Poland [2013/08/M/ST9/00322, 2013/08/M/ST9/00728, HARMONIA 5 - 2013/10/M/ST9/00062]
- Portuguese national funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal
- FEDER funds within COMPETE - Programa Operacional Factores de Competitividade through Fundacao para a Ciencia e a Tecnologia, Portugal
- Romanian Authority for Scientific Research ANCS
- CNDI-UEFISCDI [20/2012, 194/2012, 1/ASPERA2/2012 ERA-NET, PN-II-RU-PD-2011-3-0145-17, PN-II-RU-PD-2011-3-0062]
- Minister of National Education, Programme for research - Space Technology and Advanced Research - STAR, Romania [83/2013]
- Slovenian Research Agency, Slovenia
- Comunidad de Madrid
- FEDER funds
- Ministerio de Educacion y Ciencia
- Xunta de Galicia
- European Community 7th Framework Program, Spain [FP7-PEOPLE-2012-IEF-328826]
- Science and Technology Facilities Council, U.K.
- Department of Energy [DE-AC02-07CH11359, DE-FR02-04ER41300, DE-FG02-99ER41107, DE-SC0011689]
- National Science Foundation [0450696]
- Grainger Foundation, USA
- NAFOSTED, Vietnam
- Marie Curie-IRSES/EPLANET, European Particle Physics Latin American Network, European Union 7th Framework Program [PIRSES-2009-GA-246806]
- UNESCO
- [MSMT-CR LG13007]
- [7AMB14AR005]
- [CZ.1.05/2.1.00/03.0058]
- Direct For Mathematical & Physical Scien [1460394, 1153335, 1068658, 1207605, 1212538] Funding Source: National Science Foundation
- Division Of Physics [1361172] Funding Source: National Science Foundation
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We report a study of the distributions of the depth of maximum, X-max, of extensive air-shower profiles with energies above 10(17.8) eV as observed with the fluorescence telescopes of the Pierre Auger Observatory. The analysis method for selecting a data sample with minimal sampling bias is described in detail as well as the experimental cross-checks and systematic uncertainties. Furthermore, we discuss the detector acceptance and the resolution of the X-max measurement and provide parametrizations thereof as a function of energy. The energy dependence of the mean and standard deviation of the X-max distributions are compared to air-shower simulations for different nuclear primaries and interpreted in terms of the mean and variance of the logarithmic mass distribution at the top of the atmosphere.
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