{
  "id": "1810.02668",
  "version": "v1",
  "published": "2018-10-05T13:22:54.000Z",
  "updated": "2018-10-05T13:22:54.000Z",
  "title": "Faint $γ$-ray sources at low-redshift: the radio galaxy IC 1531",
  "authors": [
    "T. Bassi",
    "G. Migliori",
    "P. Grandi",
    "C. Vignali",
    "M. A. Pérez-Torres",
    "R. D. Baldi",
    "E. Torresi",
    "A. Siemiginowska",
    "C. Stanghellini"
  ],
  "comment": "11 pages, 4 figures",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We present a multi-wavelength study of IC 1531 (z=0.02564), an extragalactic radio source associated with the $\\gamma$-ray object 3FGL J0009.9-3206 and classified as a blazar of uncertain type in the Third Fermi Large Area Telescope AGN Catalog (3LAC). A core-jet structure, visible in radio and X-rays, is enclosed within a $\\sim$220 kpc wide radio structure. The morphology and spectral characteristics of the kiloparsec jet in radio and X-rays are typical of Fanaroff-Riley type I galaxies. The analysis of the radio data and optical spectrum and different diagnostic methods based on the optical, infrared and $\\gamma$-ray luminosities also support a classification as a low-power radio galaxy seen at moderate angles ($\\theta=$10$^\\circ$-20$^\\circ$). In the framework of leptonic models, the high-energy peak of the non-thermal nuclear spectral energy distribution can be explained in terms of synchrotron-self-Compton emission from a jet seen at $\\theta\\sim$15$^\\circ$. Similarly to other misaligned AGNs detected by Fermi, the required bulk motion is lower ($\\Gamma_{\\rm bulk}=$4) than the values inferred in BL Lac objects, confirming that, because of the de-boosting of emission from the highly-relativistic blazar region, these nearby systems are valuable targets to probe the existence of multiple sites of production of the most energetic emission in the jets.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-10-05T13:22:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "radio galaxy ic",
      "ray sources",
      "fermi large area telescope agn",
      "third fermi large area telescope",
      "non-thermal nuclear spectral energy distribution"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}