Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 11, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2011/11/022
Keywords
ultra high energy cosmic rays; cosmic ray experiments; cosmic rays detectors
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)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Ministerio de Ciencia e Tecnologia (MCT), Brazil
- AVCR [AV0Z10.100502, AV0Z10100522, GAAV KJB100100904, MSMT-CR LA08016, LC527, 1M06002, MSN10021620859]
- Czech Republic
- 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/CNR.S), France
- Bundesministerium far Bildung mid Forschung (BMBF)
- Deutsche Forschungsgenteinschaft (DFG)
- Finanzministerium Baden-Wurttemberg
- Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)
- Ministerium fur Wissenschaft und Forschung
- Nordrhein-Westfalen
- Forschung und Kunst, Liaden-Wurttemberg, Germany
- Istituto Nazionale di Fisica Nucleate Ministero dell'Istruzione, dell'Universita e della Ricerca (MIUR), Italy
- Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico
- Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor \\Tetenschappelijk Onderzoek (NNVO), Stichting voor Rindamenteel Onderzoelc der Materie (FOM), Netherlands
- Ministry of Science and Higher Education, Poland [N N202 200239, N N202 207238]
- Fundacao para a Ciencia e a 'Tecnologia, Portugal
- Ministry for Higher Education, Science, and Technology, Slovenian Research Agency, Slovenia
- Comunidad de Madrid, Consejerfa de Educacion de la Comunidad de Castilla La Mancha
- FEDER
- Ministerio de Ciencia e Innovacion
- CPAN
- Xunta de Galicia, Spain
- Science and Technology Facilities Council, United Kingdom
- Department of Energy [DE-AC02-07CH11359, DE-FR02-04ER41300]
- National Science Foundation [0450696]
- Grainger Foundation USA
- ALFA-EC / HELEN
- European Union [MEIF-CT-2005-025057, PIEF-GA-2008-220240]
- UNESCO
- STFC [ST/J000507/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J000507/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1068210, 1068696] Funding Source: National Science Foundation
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We present a comprehensive study of the influence of the geomagnetic field on the energy estimation of extensive air showers with a zenith angle smaller than 60 degrees, detected at the Pierre Auger Observatory. the geomagnetic field induces an azimuthal modulation of the estimated energy of cosmic rays up to the similar to 2% level at large zenith angles. We present a method to account for this modulation of the reconstructed energy. We analyse the effect of the modulation on large scale anisotropy searches in the arrival direction distributions of cosmic rays. At a given energy, the geomagnetic effect is shown to induce a pseudo-dipolar pattern at the percent level in the declination distribution that needs to be accounted for.
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