{
  "id": "1703.04586",
  "version": "v1",
  "published": "2017-03-14T17:14:04.000Z",
  "updated": "2017-03-14T17:14:04.000Z",
  "title": "The NuSTAR view of the true Type 2 Seyfert NGC3147",
  "authors": [
    "Stefano Bianchi",
    "Andrea Marinucci",
    "Giorgio Matt",
    "Riccardo Middei",
    "Xavier Barcons",
    "Loredana Bassani",
    "Francisco J. Carrera",
    "Fabio La Franca",
    "Francesca Panessa"
  ],
  "comment": "5 pages, 5 figures, accepted for publication in MNRAS",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO",
    "astro-ph.HE"
  ],
  "abstract": "We present the first NuSTAR observation of a 'true' Type 2 Seyfert galaxy. The 3-40 keV X-ray spectrum of NGC3147 is characterised by a simple power-law, with a standard {\\Gamma}~1.7 and an iron emission line, with no need for any further component up to ~40 keV. These spectral properties, together with significant variability on time-scales as short as weeks (as shown in a 2014 Swift monitoring campaign), strongly support an unobscured line-of-sight for this source. An alternative scenario in terms of a Compton-thick source is strongly disfavoured, requiring an exceptional geometrical configuration, whereas a large fraction of the solid angle to the source is filled by a highly ionised gas, whose reprocessed emission would dominate the observed luminosity. Moreover, in this scenario the implied intrinsic X-ray luminosity of the source would be much larger than the value predicted by other luminosity proxies, like the [OIII]{\\lambda}5007 emission line extinction-corrected luminosity. Therefore, we confirm with high confidence that NGC3147 is a true Type 2 Seyfert galaxy, intrinsically characterised by the absence of a BLR.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-03-14T17:14:04.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "true type",
      "seyfert ngc3147",
      "nustar view",
      "seyfert galaxy",
      "first nustar observation"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}