Anisotropy studies around the galactic centre at EeV energies with the Auger Observatory

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dc.contributor.authorAbraham, J.
dc.contributor.authorAglietta, M.
dc.contributor.authorAguirre, C.
dc.contributor.authorAllard, D.
dc.contributor.authorAllekotte, I.
dc.contributor.authorAllison, P.
dc.contributor.authorAlvarez, C.
dc.contributor.authorAlvarez-Muñiz, J.
dc.contributor.authorAmbrosio, M.
dc.contributor.authorAnchordoqui, L.
dc.contributor.authorAnjos, J. C.
dc.contributor.authorAramo, C.
dc.contributor.authorArisaka, K.
dc.contributor.authorArmengaud, E.
dc.contributor.authorArneodo, F.
dc.contributor.authorArqueros, F.
dc.contributor.authorAsch, T.
dc.contributor.authorAsorey, H.
dc.contributor.authorAtulugama, B. S.
dc.contributor.authorAublin, J.
dc.contributor.authorAve, M.
dc.contributor.authorAvila, G.
dc.contributor.authorBacelar, J.
dc.contributor.authorBäcker, T.
dc.contributor.authorBadagnani, D.
dc.contributor.authorBarbosa, A. F.
dc.contributor.authorBarbosa, H. M. J.
dc.contributor.authorBarkhausen, M.
dc.contributor.authorBarnhill, D.
dc.contributor.authorBarroso, S. L. C.
dc.contributor.authorBauleo, P.
dc.contributor.authorBeatty, J.
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dc.contributor.authorCapdevielle, J. N.
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dc.contributor.authorCastellina, A.
dc.contributor.authorCataldi, G.
dc.contributor.authorCazón, L.
dc.contributor.authorCester, R.
dc.contributor.authorChauvin, J.
dc.contributor.authorChiavassa, A.
dc.contributor.authorChinellato, J. A.
dc.contributor.authorChou, A.
dc.contributor.authorChye, J.
dc.contributor.authorClaes, D.
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dc.contributor.authorClay, S. B.
dc.contributor.authorConnolly, B.
dc.contributor.authorCordier, A.
dc.contributor.authorCotti, U.
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dc.contributor.authorCovault, C. E.
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dc.contributor.authorGarrido, X.
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dc.contributor.authorKoang, D.-H.
dc.contributor.authorKolotaev, Y.
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dc.contributor.authorKrömer, O.
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dc.date.accessioned2024-06-28T18:10:02Z
dc.date.available2024-06-28T18:10:02Z
dc.date.issued2007-04-01
dc.description.abstractData from the Pierre Auger Observatory are analyzed to search for anisotropies near the direction of the Galactic Centre at EeV energies. The exposure of the surface array in this part of the sky is already significantly larger than that of the fore-runner experiments. Our results do not support previous findings of localized excesses in the AGASA and SUGAR data. We set an upper bound on a point-like flux of cosmic rays arriving from the Galactic Centre which excludes several scenarios predicting sources of EeV neutrons from Sagittarius A. Also the events detected simultaneously by the surface and fluorescence detectors (the ‘hybrid’ data set), which have better pointing accuracy but are less numerous than those of the surface array alone, do not show any significant localized excess from this direction.
dc.description.sponsorshipWe are very grateful to the following agencies and organizations for financial support: Gobierno de Mendoza, Comisio´n Nacional de Energía Ato´mica y Municipalidad de Malargu¨e, Argentina; the Australian Research Council; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and Fundacao de Amparo a Pesquisa do Estado de Rio de Janeiro, Brasil; National Science Foundation of China; Ministry of Education of the Czech Republic (projects LA134 and LN00A006); Centre National de la Recherche Scientifique, Institut National de Physique Nucle´aire et Physique des Particules (IN2P3/CNRS), Institut National des Sciences de l’Univers (INSU/CNRS) et Conseil Re´gional Ile de France, France; German Ministry for Education and Research and Forschungszentrum Karlsruhe, Germany; Istituto Nazionale di Fisica Nucleare, Italy; Consejo Nacional de Ciencia y Tecnologia, Mexico; the Polish State Committee for Scientific Research (grant numbers 1P03D 01430, 2P03B 11024 and 2PO3D 01124), Poland; Slovenian Research Agency; Ministerio de Educacio´n y Ciencia (FPA2003-08733-C02, 2004-01198), Xunta de Galicia (2003 PXIC20612PN, 2005 PXIC20604PN) and Feder Funds, Spain; Particle Physics and Astronomy Research Council, UK; the US Department of Energy, the US National Science Foundation, USA; UNESCO; and ALFA-EC funds, in the framework of the HELEN Project.
dc.description.urihttps://www.sciencedirect.com/science/article/pii/S0927650506001733
dc.format.extent10 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m2amgi-taba
dc.identifier.citationAbraham, J., M. Aglietta, C. Aguirre, D. Allard, I. Allekotte, P. Allison, C. Alvarez, et al. “Anisotropy Studies around the Galactic Centre at EeV Energies with the Auger Observatory.” Astroparticle Physics 27, no. 4 (April 1, 2007): 244–53. https://doi.org/10.1016/j.astropartphys.2006.11.002.
dc.identifier.urihttps://doi.org/10.1016/j.astropartphys.2006.11.002
dc.identifier.urihttp://hdl.handle.net/11603/34767
dc.language.isoen_US
dc.publisherELSEVIER
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.subjectCosmic rays
dc.subjectAnisotropies
dc.subjectGalactic centre
dc.titleAnisotropy studies around the galactic centre at EeV energies with the Auger Observatory
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-4027-1855

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