{
  "id": "1008.0722",
  "version": "v1",
  "published": "2010-08-04T09:18:17.000Z",
  "updated": "2010-08-04T09:18:17.000Z",
  "title": "Suzaku Observation of the Brightest Broad-Line Radio Galaxy 4C 50.55 (IGR J 21247+5058)",
  "authors": [
    "Fumie Tazaki",
    "Yoshihiro Ueda",
    "Yukiko Ishino",
    "Satoshi Eguchi",
    "Naoki Isobe",
    "Yuichi Terashima",
    "Richard F. Mushotzky"
  ],
  "comment": "8 pages, 7 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We report the results from a deep Suzaku observation of 4C 50.55 (IGR J 21247+5058), the brightest broad-line radio galaxy in the hard X-ray (> 10 keV) sky. The simultaneous broad band spectra over 1-60 keV can be represented by a cut-off power law with two layers of absorption and a significant reflection component from cold matter with a solid angle of \\Omega/2\\pi \\approx 0.2. A rapid flux rise by ~ 20% over 2 \\times 10^4 sec is detected in the 2-10 keV band. The spectral energy distribution suggests that there is little contribution to the total X-ray emission from jets. Applying a thermal Comptonization model, we find that corona is optically thick (\\tau_e \\approx 3) and has a relatively low temperature (kT_e \\approx 30 keV). The narrow iron-K emission line is consistent with a picture where the standard disk is truncated and/or its inner part is covered by optically thick Comptonizing corona smearing out relativistic broad line features. The inferred disk structure may be a common feature of accretion flows onto black holes that produce powerful jets.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2010-08-04T09:18:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "brightest broad-line radio galaxy 4c",
      "suzaku observation",
      "thick comptonizing corona smearing",
      "narrow iron-k emission line",
      "relativistic broad line features"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/0004-637X/721/2/1340",
      "journal": "The Astrophysical Journal",
      "year": 2010,
      "month": "Oct",
      "volume": 721,
      "number": 2,
      "pages": 1340
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 864430,
      "adsabs": "2010ApJ...721.1340T"
    }
  }
}