{
  "id": "1412.2483",
  "version": "v1",
  "published": "2014-12-08T08:33:28.000Z",
  "updated": "2014-12-08T08:33:28.000Z",
  "title": "High-energy observations of PSR B1259-63/LS 2883 through the 2014 periastron passage: connecting X-rays to the GeV flare",
  "authors": [
    "P. H. T. Tam",
    "K. L. Li",
    "J. Takata",
    "A. T. Okazaki",
    "C. Y. Hui",
    "A. K. H. Kong"
  ],
  "comment": "16 pages, 3 figures, 2 tables, ApJ Letters, in press",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The binary system PSR B1259-63/LS 2883 is well sampled in radio, X-rays, and TeV gamma-rays, and shows orbital phase-dependent variability in these frequencies. The first detection of GeV gamma-rays from the system was made around the 2010 periastron passage. In this Letter, we present an analysis of X-ray and gamma-ray data obtained by the Swift/XRT, NuSTAR/FPM, and Fermi/LAT, through the recent periastron passage which occurred on 2014 May 4. While PSR B1259-63/LS 2883 was not detected by the LAT before and during this passage, we show that the GeV flares occurred at a similar orbital phase as in early 2011, thus establishing the repetitive nature of the post-periastron GeV flares. Multiple flares each lasting for a few days have been observed and short-term variability is seen as well. We also found X-ray flux variation contemporaneous with the GeV flare for the first time. A strong evidence of the keV-to-GeV connection came from the broadband high-energy spectra, which we interpret as synchrotron radiation from the shocked pulsar wind.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-12-08T08:33:28.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "periastron passage",
      "high-energy observations",
      "connecting x-rays",
      "kev-to-gev connection came",
      "x-ray flux variation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1088/2041-8205/798/1/L26",
      "journal": "The Astrophysical Journal",
      "year": 2015,
      "month": "Jan",
      "volume": 798,
      "number": 1
    },
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2015ApJ...798L..26T",
      "inspire": 1333186
    }
  }
}