{
  "id": "0904.4377",
  "version": "v1",
  "published": "2009-04-28T12:35:01.000Z",
  "updated": "2009-04-28T12:35:01.000Z",
  "title": "Pulsed Gamma-rays from the millisecond pulsar J0030+0451 with the Fermi Large Area Telescope",
  "authors": [
    "Fermi/LAT Collaboration"
  ],
  "comment": "Accepted for publication in the Astrophysical Journal",
  "journal": "Astrophys.J.699:1171-1177,2009",
  "doi": "10.1088/0004-637X/699/2/1171",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "We report the discovery of gamma-ray pulsations from the nearby isolated millisecond pulsar PSR J0030+0451 with the Large Area Telescope (LAT) on the \\emph{Fermi} Gamma-ray Space Telescope (formerly GLAST). This discovery makes PSR J0030+0451 the second millisecond pulsar to be detected in gamma-rays after PSR J0218+4232, observed by the EGRET instrument on the Compton Gamma Ray Observatory. The spin-down power $\\dot E = $ 3.5 $\\times$ 10$^{33}$ ergs s$^{-1}$ is an order of magnitude lower than the empirical lower bound of previously known gamma-ray pulsars. The emission profile is characterized by two narrow peaks, respectively 0.07 $\\pm$ 0.01 and 0.08 $\\pm$ 0.02 wide, separated by 0.44 $\\pm$ 0.02 in phase. The first gamma-ray peak falls 0.15 $\\pm$ 0.01 after the main radio peak. The pulse shape is similar to that of the \"normal\" gamma-ray pulsars. An exponentially cut-off power-law fit of the emission spectrum leads to an integral photon flux above 100 MeV of (6.76 $\\pm$ 1.05 $\\pm$ 1.35) $\\times 10^{-8}$ cm$^{-2}$ s$^{-1}$ with cut-off energy (1.7 $\\pm$ 0.4 $\\pm$ 0.5) GeV. Based on its parallax distance of $(300 \\pm 90)$ pc, we obtain a gamma-ray efficiency $L_\\gamma / \\dot{E} \\simeq 15%$ for the conversion of spin-down energy rate into gamma-ray radiation, assuming isotropic emission.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-04-28T12:35:01.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "fermi large area telescope",
      "pulsed gamma-rays",
      "compton gamma ray observatory",
      "first gamma-ray peak falls",
      "nearby isolated millisecond pulsar psr"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "The Astrophysical Journal",
      "year": 2009,
      "month": "Jul",
      "volume": 699,
      "number": 2,
      "pages": 1171
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 818922,
      "adsabs": "2009ApJ...699.1171A"
    }
  }
}