{
  "id": "1611.02289",
  "version": "v1",
  "published": "2016-11-07T21:00:05.000Z",
  "updated": "2016-11-07T21:00:05.000Z",
  "title": "Identifying four $INTEGRAL$ sources in the Galactic Plane via VLT/optical and $XMM$-$Newton$/X-ray spectroscopy",
  "authors": [
    "Farid Rahoui",
    "John A. Tomsick",
    "Roman Krivonos"
  ],
  "comment": "10 pages, 8 figures, 4 tables. Accepted for publication in MNRAS",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We report on FORS2 spectroscopy aiming at the identification of four Galactic Plane sources discovered by $INTEGRAL$, IGR J18088-2741, IGR J18381-0924, IGR J17164-3803, and IGR J19173+0747, complemented by $XMM$-$Newton$ spectroscopy for IGR J18381-0924. The presence of broad emission lines of neutral H and He and a flat Balmer decrement H{\\alpha}/H{\\beta} show that IGR J18088-2741 is a cataclysmic variable located beyond 8 kpc. For IGR J18381-0924, the detection of red-shifted H{\\alpha} and neutral O emission signatures and the absence of narrow forbidden emission lines point towards a low-luminosity Seyfert 1.9 nature at $z=0.031\\pm0.002$. Its $XMM$-$Newton$ spectrum, best-fit by an absorbed ${\\Gamma}=1.19\\pm0.07$ power law combined with a $z=0.026_{-0.016}^{+0.008}$ red-shifted iron emission feature, is in agreement with this classification. The likely IGR J17164-3803 optical counterpart is an M2 III star at 3 to 4 kpc which, based on the X-ray spectrum of the source, is the companion of a white dwarf in an X-ray faint symbiotic system. Finally, we challenge the accepted identification of IGR J19173+0747 as an high mass X-ray binary. Indeed, the USNO optical counterpart is actually a blend of two objects located at the most likely 3 kpc distance, both lying within the error circle of the Swift position. The first is a cataclysmic variable, which we argue is the real nature of IGR J19173+0747. However, we cannot rule out the second one that we identify as an F3 V star that, if associated to IGR J19173+0747, likely belongs to a quiescent X-ray binary.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-11-07T21:00:05.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-ray spectroscopy",
      "narrow forbidden emission lines point",
      "x-ray faint symbiotic system",
      "high mass x-ray binary",
      "galactic plane sources"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}