{
  "id": "1605.04660",
  "version": "v1",
  "published": "2016-05-16T06:24:34.000Z",
  "updated": "2016-05-16T06:24:34.000Z",
  "title": "Black hole central engine for ultra-long gamma-ray burst 111209A and its associated supernova 2011kl",
  "authors": [
    "He Gao",
    "Wei-Hua Lei",
    "Zhi-Qiang You",
    "Wei Xie"
  ],
  "comment": "Accepted for publication in ApJ",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Recently, the first association between an ultra-long gamma-ray burst (GRB) and a supernova is reported, i.e., GRB 111209A/SN 2011kl, which enables us to investigate the physics of central engines or even progenitors for ultra-long GRBs. In this paper, we inspect the broad-band data of GRB 111209A/SN 2011kl. The late-time X-ray lightcurve exhibits a GRB 121027A-like fall-back bump, suggesting a black hole central engine. We thus propose a collapsar model with fall-back accretion for GRB 111209A/SN 2011kl. The required model parameters, such as the total mass and radius of the progenitor star, suggest that the progenitor of GRB 111209A is more likely a Wolf-Rayet star instead of blue supergiant, and the central engine of this ultra-long burst is a black hole. The implications of our results is discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-05-16T06:24:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole central engine",
      "ultra-long gamma-ray burst 111209a",
      "associated supernova 2011kl",
      "grb 111209a/sn 2011kl"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1459013
    }
  }
}