{
  "id": "1704.01335",
  "version": "v1",
  "published": "2017-04-05T09:45:17.000Z",
  "updated": "2017-04-05T09:45:17.000Z",
  "title": "The Black Hole Candidate LSI+61303",
  "authors": [
    "M. Massi",
    "S. Migliari",
    "M. Chernyakova"
  ],
  "comment": "5 pages, 4 figures, MNRAS accepted",
  "doi": "10.1093/mnras/stx778",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "In recent years, fundamental relationships for the black hole X-ray binaries have been established between their X-ray luminosity $L_X$ and the photon index $\\Gamma$ of their X-ray spectrum. For the moderate-luminosity regime, an anti-correlation between $\\Gamma$ and $L_X$ has been observed. In this article, aimed to verify if the moderate luminous X-ray binary system LSI +61303 is a black hole, we analyse $Swift$ observations of LSI +61303. We compare the derived $L_X$ vs $\\Gamma$ distribution, first with the statistical trend for black hole X-ray binaries, then with the trend of the pulsar PSR B1259-63, and finally with the individual trends of the black hole X-ray binaries Swift J1357.2-0933 and V404 Cygni. We find that the system PSR B1259-63 shows a positive correlation between $\\Gamma$ and $L_X$, whereas in contrast LSI +61303 shows the same anti-correlation as for black hole X-ray binaries. Moreover, the trend of LSI +61303 in the $L_X$/$L_{Eddington} - \\Gamma$ plane overlaps with that of the two black holes Swift J1357.2-0933 and V404 Cygni. All three systems, Swift J1357.2-0933, V404 Cygni and LSI +61303 well trace the last part of the evolution of accreting black holes at moderate-luminosity until their drop to quiescence.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-04-05T09:45:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "black hole x-ray binaries",
      "black hole candidate",
      "x-ray binaries swift j1357",
      "x-ray binary system lsi",
      "hole x-ray binaries swift"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}