{
  "id": "0907.4974",
  "version": "v1",
  "published": "2009-07-28T18:34:37.000Z",
  "updated": "2009-07-28T18:34:37.000Z",
  "title": "VERITAS Observations of Globular Clusters",
  "authors": [
    "Michael McCutcheon",
    "for the VERITAS Collaboration"
  ],
  "comment": "3 pages, no figures, to be published in Proceedings of the 31st International Cosmic Ray Conference (ICRC), Lodz, Poland, July 2009 except an error in the conversion of the upper limits corrected here",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "It has been postulated that globular clusters could be sources of Very-High Energy (VHE) gamma rays, powered by milli-second pulsars. This could be due to cumulative direct emission or to plerion-type emission driven by colliding winds. In particular the southern hemisphere globular cluster 47 Tuc has been singled out as a potential source in both models. In light of the recent detection by the Fermi Gamma-ray Space Telescope (FGST) of 47 Tuc, the first detection of any globular cluster as a gamma-ray source, we present the results of observations of northern hemisphere globular clusters by VERITAS. Three globular clusters have been observed: M15, M13 and M5. Of these, M15 and M13 have been explicitly proposed as VHE gamma-ray sources and M5 possess similarities with them.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-07-28T18:34:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "veritas observations",
      "fermi gamma-ray space telescope",
      "southern hemisphere globular cluster",
      "plerion-type emission driven",
      "northern hemisphere globular clusters"
    ],
    "tags": [
      "conference paper"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 827113,
      "adsabs": "2009arXiv0907.4974M"
    }
  }
}