期刊
ASTROPHYSICAL JOURNAL
卷 789, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0004-637X/789/2/160
关键词
astroparticle physics; cosmic rays; methods: data analysis
资金
- Comision Nacional de Energia Atomica
- Fundacion Antorchas
- Gobierno De La Provincia de Mendoza
- Municipalidad de Malargue
- NDM Holdings and Valle Las Lenas
- Australian Research Council
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Financiadora de Estudos e Projetos (FINEP)
- Fundacao de Amparoa 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 [MSMT-CR LG13007, 7AMB14AR005, CZ.1.05/2.1.00/03.0058]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1153335] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1068696, 1053663, 1361172] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1212538, 1068658] Funding Source: National Science Foundation
Measurements of air showers made using the hybrid technique developed with the fluorescence and surface detectors of the Pierre Auger Observatory allow a sensitive search for point sources of EeV photons anywhere in the exposed sky. A multivariate analysis reduces the background of hadronic cosmic rays. The search is sensitive to a declination band from -85 degrees to +20 degrees, in an energy range from 10(17.3) eV to 10(18.5) eV. No photon point source has been detected. An upper limit on the photon flux has been derived for every direction. The mean value of the energy flux limit that results from this, assuming a photon spectral index of -2, is 0.06 eV cm(-2) s(-1), and no celestial direction exceeds 0.25 eV cm(-2) s(-1). These upper limits constrain scenarios in which EeV cosmic ray protons are emitted by non-transient sources in the Galaxy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据