{
  "id": "1807.11431",
  "version": "v1",
  "published": "2018-07-30T16:40:14.000Z",
  "updated": "2018-07-30T16:40:14.000Z",
  "title": "Broadband spectral analysis of MXB 1659-298 in its soft and hard state",
  "authors": [
    "R. Iaria",
    "S. Mazzola",
    "T. Bassi",
    "A. F. Gambino",
    "A. Marino",
    "T. Di Salvo",
    "A. Sanna",
    "A. Riggio",
    "L. Burderi",
    "N. D'Amico"
  ],
  "comment": "14 pages, 8 Figures. Submitted to Astronomy & Astrophysics",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "The X-ray transient eclipsing source MXB 1659-298 went in outburst in 1999 and 2015, respectively. During these two outbursts the source was observed by XMM-Newton, NuSTAR and Swift/XRT. Using these observations we studied the broadband spectrum of the source to constrain the continuum components and to verify the presence of a reflection component as recently observed in the X-ray eclipsing transient source AX J1745.6-2901. We combined the available spectra studying the soft and hard state of the source in the 0.4-35 keV and 0.45-55 keV energy range, respectively. We find that the soft state can be modelled with a thermal component associated with the inner accretion disk plus a Comptonized component. A broad emission line at 6.6 keV and narrow absorption lines associated with highly ionized ions of oxygen, neon and iron are observed. We obtain a best-fit model using a smeared reflection component that fits a reflection emission from the innermost region of the system and adding a component that takes into account the ionized absorber where the narrow absorption lines forms. The equivalent hydrogen column density associated with the absorber is close to $6 \\times 10^{23}$ cm$^{-2}$. On the other hand, the direct continuum emission in the hard state can be described by a comptonized component with a temperature larger than 150 keV. Also in this state a reflection component and a ionized absorber are observed. The equivalent hydrogen column density associated with the absorber is close to $1.3 \\times 10^{23}$ cm$^{-2}$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-07-30T16:40:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "broadband spectral analysis",
      "hard state",
      "transient source ax j1745",
      "equivalent hydrogen column density",
      "eclipsing transient source ax"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}