{
  "id": "astro-ph/0309580",
  "version": "v1",
  "published": "2003-09-22T14:15:44.000Z",
  "updated": "2003-09-22T14:15:44.000Z",
  "title": "The phase of the radio and X-ray pulses of PSR B1937+21",
  "authors": [
    "G. Cusumano",
    "W. Hermsen",
    "M. Kramer",
    "L. Kuiper",
    "O. Lohmer",
    "E. Massaro",
    "T. Mineo",
    "L. Nicastro",
    "B. W. Stappers"
  ],
  "comment": "5 pages, 2 figures, accepted for pubblication in Astronomy and Astrophysics Letters",
  "journal": "Nucl.Phys.Proc.Suppl.132:596-599,2004; Astron.Astrophys.410:L9-L12,2003",
  "doi": "10.1016/j.nuclphysbps.2004.04.101",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We present timing and spectral results of PSR B1937+21, the fastest known millisecond pulsar (P about 1.56 ms), observed with RXTE. The pulse profile, detected up to 20 keV, shows a double peak with the main component much stronger than the other. The peak phase separation is 0.526 +/- 0.002 and the pulsed spectrum over the energy range 2--25 keV is well described by a power law with a photon index equal to 1.14 +/- 0.07. We find that the X-ray pulses are closely aligned in phase with the giant pulses observed in the radio band. This results suggest that giant radio pulses and X-ray pulses originate in the same region of the magnetosphere due to a high and fluctuating electron density that occasionally emits coherently in the radio band. The X-ray events, however, do not show any clustering in time indicating that no X-ray flares are produced.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-09-22T14:15:44.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio band",
      "x-ray pulses originate",
      "giant radio pulses",
      "peak phase separation",
      "photon index equal"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 628723
    }
  }
}