{
  "id": "1301.3362",
  "version": "v1",
  "published": "2013-01-15T14:31:33.000Z",
  "updated": "2013-01-15T14:31:33.000Z",
  "title": "RXJ0123.4-7321, a Be/X-ray binary in the wing of the SMC",
  "authors": [
    "R. Sturm",
    "F. Haberl",
    "W. Pietsch",
    "A. Udalski"
  ],
  "comment": "5 pages, 8 figures, accepted for publication in A&A",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "To confirm faint Be/X-ray binary candidates from the XMM-Newton survey of the Small Magellanic Cloud, we searched for X-ray outbursts in archival ROSAT observations. We found that RXJ0123.4-7321 was much brighter when detected with ROSAT than seen 16 years later by XMM-Newton. We analysed the ROSAT observations and the OGLE I-band light curve of the optical counterpart to investigate the nature of the system. High long-term variability in the X-ray flux of a factor of ~150 was found between the ROSAT and XMM-Newton detections, indicating strong outburst activity during the ROSAT observations. The I-band light curve reveals long-term variability and regular outbursts with a period of (119.9+-2.5) days indicating the orbital period of the binary system. The large X-ray flux variations and the properties of the optical counterpart confirm RXJ0123.4-7321 as a new Be/X-ray binary in the wing of the Small Magellanic Cloud.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-01-15T14:31:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "rosat observations",
      "small magellanic cloud",
      "confirm faint be/x-ray binary candidates",
      "large x-ray flux variations",
      "ogle i-band light curve"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1210851,
      "adsabs": "2013arXiv1301.3362S"
    }
  }
}