{
  "id": "astro-ph/0308220",
  "version": "v1",
  "published": "2003-08-12T21:55:54.000Z",
  "updated": "2003-08-12T21:55:54.000Z",
  "title": "Chandra Observations of SNR 1987A",
  "authors": [
    "S. Park",
    "D. N. Burrows",
    "S. A. Zhekov",
    "E. Michael",
    "R. McCray",
    "G. Hasinger"
  ],
  "comment": "8 pages, 6 figures, 2 color figures, To appear in AdSpR (Proceedings 34th COSPAR Synposium E1.4 \"High Energy Studies of Supernova Remnants and Neutron stars\" For high resolution color figures contact park@astro.psu.edu",
  "doi": "10.1016/j.asr.2003.08.017",
  "categories": [
    "astro-ph"
  ],
  "abstract": "We report on the results of our monitoring program of the X-ray remnant of supernova 1987A with the {\\it Chandra X-Ray Observatory}. We have performed two new observations during the {\\it Chandra} Cycle 3 period, bringing the total to six monitoring observations over the past three years. These six observations provide a detailed time history of the birth of a new supernova remnant in X-rays. The high angular resolution images indicate that soft X-ray bright knots are associated with the optical spots, while hard X-ray features are better correlated with radio images. We interpret this in terms of a model in which fast shocks propagating through the circumstellar HII region produce the hard X-ray and radio emission, while the soft X-ray and optical emission arise in slower shocks entering into dense knots in the circumstellar inner ring. New observations begin to show changes in the morphology that may herald a new stage in the development of this incipient supernova remnant. The observed X-ray fluxes increase by nearly a factor of three over the last 30 months. The X-ray remnant is expanding at a velocity of $\\sim$5000 km s$^{-1}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-08-12T21:55:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "chandra observations",
      "snr 1987a",
      "x-ray remnant",
      "high angular resolution images",
      "circumstellar hii region produce"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 625842
    }
  }
}