{
  "id": "1807.10246",
  "version": "v1",
  "published": "2018-07-26T17:09:53.000Z",
  "updated": "2018-07-26T17:09:53.000Z",
  "title": "The NuSTAR view of the Seyfert Galaxy HE 0436-4717",
  "authors": [
    "Riccardo Middei",
    "Fausto Vagnetti",
    "Francesco Tombesi",
    "Stefano Bianchi",
    "Andrea Marinucci",
    "Francesco Ursini",
    "Alessia Tortosa"
  ],
  "comment": "accepted for publication in A&A",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the multi epoch spectral analysis of HE 0436-4717, a bright Seyfert 1 galaxy serendipitously observed by the high energy satellite NuSTAR four times between December 2014 and December 2015. The source flux shows modest variability within each pointing and among the four observations. Spectra are well modelled in terms of a weakly variable primary power law with constant photon index ($\\Gamma$=2.01$\\pm$0.08). A constant narrow \\ion{Fe} K$\\alpha$ emission line suggests that this feature has an origin far from the central black hole, while a broad relativistic component is not required by the data. The Compton reflection component is also constant in flux with a corresponding reflection fraction R=0.7$^{+0.2}_{-0.3}$. The iron abundance is compatible with being Solar (A$_{Fe}$=1.2$^{+1.4}_{-0.4}$), and a lower limit for the high energy cut-off E$_c$>280 keV is obtained. Adopting a self-consistent model accounting for a primary Comptonized continuum, we obtain a lower limit for the hot corona electron temperature kT$_e$>65 keV and a corresponding upper limit for the coronal optical depth of $\\tau_e$<1.3. The results of the present analysis are consistent with the locus of local Seyfert galaxies in the kT$_e$-$\\tau_e$ and temperature-compactness diagrams.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-07-26T17:09:53.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "seyfert galaxy",
      "nustar view",
      "variable primary power law",
      "hot corona electron temperature kt",
      "lower limit"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}