{
  "id": "1503.07786",
  "version": "v1",
  "published": "2015-03-26T17:04:15.000Z",
  "updated": "2015-03-26T17:04:15.000Z",
  "title": "Measurement of the cosmic ray spectrum above $4{\\times}10^{18}$ eV using inclined events detected with the Pierre Auger Observatory",
  "authors": [
    "The Pierre Auger Collaboration"
  ],
  "comment": "22 pages, 9 figures, submitted to Journal of Cosmology and Astroparticle Physics (JCAP)",
  "categories": [
    "astro-ph.HE",
    "hep-ex"
  ],
  "abstract": "A measurement of the cosmic-ray spectrum for energies exceeding $4{\\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\\times}10^{18}$ eV, the \"ankle\", the flux can be described by a power law $E^{-\\gamma}$ with index $\\gamma=2.70 \\pm 0.02 \\,\\text{(stat)} \\pm 0.1\\,\\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\\text{s}=(5.12\\pm0.25\\,\\text{(stat)}^{+1.0}_{-1.2}\\,\\text{(sys)}){\\times}10^{19}$ eV.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-03-26T17:04:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "pierre auger observatory",
      "cosmic ray spectrum",
      "inclined events",
      "measurement",
      "zenith angles greater"
    ],
    "publication": {
      "doi": "10.1088/1475-7516/2015/08/049",
      "journal": "Journal of Cosmology and Astro-Particle Physics",
      "year": 2015,
      "month": "Aug",
      "volume": 2015,
      "number": 8,
      "pages": "049"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015JCAP...08..049P",
      "inspire": 1356255
    }
  }
}