{
  "id": "1102.1213",
  "version": "v1",
  "published": "2011-02-07T00:05:24.000Z",
  "updated": "2011-02-07T00:05:24.000Z",
  "title": "Soft and Hard X-Ray Emissions from the Anomalous X-ray Pulsar 4U 0142+61 Observed with Suzaku",
  "authors": [
    "Teruaki Enoto",
    "Kazuo Makishima",
    "Kazuhiro Nakazawa",
    "Motohide Kokubun",
    "Madoka Kawaharada",
    "Jun'ichi Kotoku",
    "Noriaki Shibazaki"
  ],
  "comment": "24 pages, 8 figures, accepted for publication in Publications of the Astronomical Society of Japan",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The anomalous X-ray pulsar 4U 0142+61 was observed with Suzaku on 2007 August 15 for a net exposure of -100 ks, and was detected in a 0.4 to ~70 keV energy band. The intrinsic pulse period was determined as 8.68878 \\pm 0.00005 s, in agreement with an extrapolation from previous measurements. The broadband Suzaku spectra enabled a first simultaneous and accurate measurement of the soft and hard components of this object by a single satellite. The former can be reproduced by two blackbodies, or slightly better by a resonant cyclotron scattering model. The hard component can be approximated by a power-law of photon index \\Gamma h ~0.9 when the soft component is represented by the resonant cyclotron scattering model, and its high-energy cutoff is constrained as >180 keV. Assuming an isotropic emission at a distance of 3.6 kpc, the unabsorbed 1-10 keV and 10-70 keV luminosities of the soft and hard components are calculated as 2.8e+35 erg s^{-1} and 6.8e+34 erg s^{-1}, respectively. Their sum becomes ~10^3 times as large as the estimated spin-down luminosity. On a time scale of 30 ks, the hard component exhibited evidence of variations either in its normalization or pulse shape.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-02-07T00:05:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "anomalous x-ray pulsar 4u",
      "hard x-ray emissions",
      "hard component",
      "resonant cyclotron scattering model",
      "broadband suzaku spectra"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/pasj/63.2.387",
      "journal": "Publications of the Astronomical Society of Japan",
      "year": 2011,
      "month": "Apr",
      "volume": 63,
      "pages": 387
    },
    "note": {
      "typesetting": "TeX",
      "pages": 24,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 888764,
      "adsabs": "2011PASJ...63..387E"
    }
  }
}