{
  "id": "1001.1855",
  "version": "v1",
  "published": "2010-01-12T11:35:14.000Z",
  "updated": "2010-01-12T11:35:14.000Z",
  "title": "Detection of High-Energy Gamma-Ray Emission from the Globular Cluster 47 Tucanae with Fermi",
  "authors": [
    "N. A. Webb",
    "J. Knödlseder"
  ],
  "comment": "2009 Fermi Symposium eConf Proceedings C091122. 5 pages and 2 figures",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "Globular clusters are known to harbour a significant population of neutron star X-ray binaries that could be responsible for delaying the inevitable core collapse of these dense clusters. As a result, their progeny, namely millisecond pulsars, are also present in large numbers. Following the confirmation using the Fermi Gamma-ray Space Telescope that millisecond pulsars are indeed gamma-ray emitters, we report on the detection of the Galactic globular cluster 47 Tuc with the Fermi Large Area Telescope. This is the first detection of a Galactic globular cluster in the gamma-ray domain. The gamma-ray spectrum is consistent with gamma-ray emission from a population of millisecond pulsars. The observed gamma-ray luminosity implies an upper limit of 60 millisecond pulsars present in 47 Tucanae.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-01-12T11:35:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high-energy gamma-ray emission",
      "millisecond pulsars",
      "galactic globular cluster",
      "fermi gamma-ray space telescope",
      "fermi large area telescope"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 842624,
      "adsabs": "2010arXiv1001.1855W"
    }
  }
}