{
  "id": "1108.0161",
  "version": "v1",
  "published": "2011-07-31T10:17:56.000Z",
  "updated": "2011-07-31T10:17:56.000Z",
  "title": "Discovery of gamma and X-ray pulsations from the young and energetic PSR J1357-6429 with Fermi and XMM-Newton",
  "authors": [
    "M. Lemoine-Goumard",
    "V. E. Zavlin",
    "M. -H. Grondin",
    "R. Shannon",
    "D. A. Smith",
    "M. Burgay",
    "F. Camilo",
    "J. Cohen-Tanugi",
    "P. C. C. Freire",
    "J. E. Grove",
    "L. Guillemot",
    "S. Johnston",
    "M. Keith",
    "M. Kramer",
    "R. N. Manchester",
    "P. F. Michelson",
    "D. Parent",
    "A. Possenti",
    "P. S. Ray",
    "M. Renaud",
    "S. E. Thorsett",
    "P. Weltevrede",
    "M. T. Wolff"
  ],
  "comment": "Accepted for publication by A&A; 7 pages, 5 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "Since the launch of the Fermi satellite, the number of known gamma-ray pulsars has increased tenfold. Most gamma-ray detected pulsars are young and energetic, and many are associated with TeV sources. PSR J1357-6429 is a high spin-down power pulsar (Edot = 3.1 * 10^36 erg/s), discovered during the Parkes multibeam survey of the Galactic plane, with significant timing noise typical of very young pulsars. In the very-high-energy domain, H.E.S.S. has reported the detection of the extended source HESS J1356-645 (intrinsic Gaussian width of 12') whose centroid lies 7' from PSR J1357-6429. Using a rotational ephemeris obtained with 74 observations made with the Parkes telescope at 1.4 GHz, we phase-fold more than two years of gamma-ray data acquired by Fermi-LAT as well as those collected with XMM-Newton, and perform gamma-ray spectral modeling. Significant gamma and X-ray pulsations are detected from PSR J1357-6429. The light curve in both bands shows one broad peak. Gamma-ray spectral analysis of the pulsed emission suggests that it is well described by a simple power-law of index 1.5 +/- 0.3stat +/- 0.3syst with an exponential cut-off at 0.8 +/- 0.3stat +/- 0.3syst GeV and an integral photon flux above 100 MeV of (6.5 +/- 1.6stat +/- 2.3syst) * 10^-8 cm^-2 s^-1. The X-ray spectra obtained from the new data provide results consistent with those reported by Zavlin (2007). Upper limits on the gamma-ray emission from its potential pulsar wind nebula (PWN) are also reported. Assuming a distance of 2.4 kpc, the Fermi LAT energy flux yields a gamma-ray luminosity for PSR J1357-6429 of L_gamma = (2.13 +/- 0.25stat +/- 0.83syst) * 10^34 erg/s, consistent with an L_gamma \\propto sqrt(Edot) relationship. The Fermi non-detection of the pulsar wind nebula associated with HESS J1356-645 provides new constraints on the electron population responsible for the extended TeV emission.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-07-31T10:17:56.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-ray pulsations",
      "energetic psr",
      "fermi lat energy flux yields",
      "xmm-newton",
      "potential pulsar wind nebula"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/201117413",
      "journal": "Astronomy and Astrophysics",
      "year": 2011,
      "month": "Sep",
      "volume": 533
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 921749,
      "adsabs": "2011A&A...533A.102L"
    }
  }
}