{
  "id": "1605.02793",
  "version": "v1",
  "published": "2016-05-09T21:40:01.000Z",
  "updated": "2016-05-09T21:40:01.000Z",
  "title": "Prospects for annihilating Dark Matter towards Milky Way's dwarf galaxies by the Cherenkov Telescope Array",
  "authors": [
    "Valentin Lefranc",
    "Paolo Panci",
    "Gary A. Mamon"
  ],
  "comment": "16 pages, 4 figures",
  "categories": [
    "astro-ph.HE",
    "hep-ex",
    "hep-ph"
  ],
  "abstract": "We derive the large Cherenkov Telescope Array (CTA) sensitivity to dark matter (DM) annihilation in several primary channels, over a broad range of DM masses. These sensitivities are estimated when CTA is pointed towards a large sample of Milky Way's dwarf spheroidal galaxies (dSphs) with promising $J$-factors and small statistical uncertainties. This analysis neglects systematic uncertainties, which we estimate at the level of at least 1 dex. We also present sensitivities on the annihilation cross section from a combined analysis of 4 dSphs. We assess the CTA sensitivity by: $i)$ using, for each dSph, recent determination of the $J$-factor and its statistical error; $ii)$ considering the most up-to-date cosmic ray background; and $iii)$ applying a joint spatial and spectral analysis in the likelihood. We find that a joint spectral and spatial analysis improves the CTA sensitivity, in particular for primary channels with sharp features in the $\\gamma$-ray energy spectrum and for dSphs with steep $J$-factor profiles, as deduced from the internal kinematics. The greatest sensitivities are obtained for observations of Ursa Minor among the classical dSphs and of Ursa Major II for ultra-faint dSphs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-05-09T21:40:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "cherenkov telescope array",
      "milky ways dwarf galaxies",
      "annihilating dark matter",
      "ways dwarf spheroidal galaxies",
      "sensitivity"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1456908
    }
  }
}