{
  "id": "1502.03171",
  "version": "v1",
  "published": "2015-02-11T02:09:29.000Z",
  "updated": "2015-02-11T02:09:29.000Z",
  "title": "Varying Faces of Photospheric Emission in Gamma-Ray Bursts",
  "authors": [
    "M. Axelsson",
    "for the Fermi-LAT Collaboration"
  ],
  "comment": "2014 Fermi Symposium proceedings - eConf C14102.1",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Among the more than 1000 gamma-ray bursts observed by the Fermi Gamma-ray Space Telescope, a large fraction show narrow and hard spectra inconsistent with non-thermal emission, signifying optically thick emission from the photosphere. However, only a few of these bursts have spectra consistent with a pure Planck function. We will discuss the observational features of photospheric emission in these GRBs as well as in the ones showing multi-component spectra. We interpret the observations in light of models of subphotospheric dissipation, geometrical broadening and multi-zone emission, and show what we can learn about the dissipation mechanism and properties of GRB jets.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-02-11T02:09:29.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "photospheric emission",
      "gamma-ray bursts",
      "varying faces",
      "fermi gamma-ray space telescope",
      "hard spectra inconsistent"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1343962
    }
  }
}