{
  "id": "0901.3095",
  "version": "v1",
  "published": "2009-01-20T16:41:43.000Z",
  "updated": "2009-01-20T16:41:43.000Z",
  "title": "2XMMi J225036.9+573154 - a new eclipsing AM Her binary discovered using XMM-Newton",
  "authors": [
    "Gavin Ramsay",
    "Simon Rosen",
    "Pasi Hakala",
    "Thomas Barclay"
  ],
  "comment": "Accepted for publication in MNRAS",
  "doi": "10.1111/j.1365-2966.2009.14528.x",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE"
  ],
  "abstract": "We report the discovery of an eclipsing polar, 2XMMi J225036.9+573154, using XMM-Newton. It was discovered by searching the light curves in the 2XMMi catalogue for objects showing X-ray variability. Its X-ray light curve shows a total eclipse of the white dwarf by the secondary star every 174 mins. An extended pre-eclipse absorption dip is observed in soft X-rays at phi=0.8-0.9, with evidence for a further dip in the soft X-ray light curve at phi~0.4. Further, X-rays are seen from all orbital phases (apart from the eclipse) which makes it unusual amongst eclipsing polars. We have identified the optical counterpart, which is faint (r=21), and shows a deep eclipse (>3.5 mag in white light). Its X-ray spectrum does not show a distinct soft X-ray component which is seen in many, but not all, polars. Its optical spectrum shows Halpha in emission for a fraction of the orbital period.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-01-20T16:41:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "xmm-newton",
      "distinct soft x-ray component",
      "soft x-ray light curve",
      "eclipsing polar",
      "extended pre-eclipse absorption dip"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Wiley-Blackwell",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2009,
      "month": "May",
      "volume": 395,
      "number": 1,
      "pages": 416
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 811588,
      "adsabs": "2009MNRAS.395..416R"
    }
  }
}