{
  "id": "1410.1709",
  "version": "v1",
  "published": "2014-10-07T12:52:19.000Z",
  "updated": "2014-10-07T12:52:19.000Z",
  "title": "Very high energy $γ$-ray emission from RBS 0679",
  "authors": [
    "Anthony M. Brown",
    "Paula M. Chadwick",
    "Hermine Landt"
  ],
  "comment": "accepted for publication in MNRAS, 6 pages, 3 figures, 2 tables. arXiv admin note: substantial text overlap with arXiv:1404.3583",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "In this paper we report the \\textit{Fermi} Large Area Telescope (LAT) detection of Very High Energy (VHE; $E_{\\gamma}>100$ GeV) $\\gamma$-ray emission from the BL Lac object RBS 0679. $5.3$ years of LAT observations revealed the presence of three VHE photon events within 0.1 degrees of RBS 0679, with a subsequent unbinned likelihood analysis finding RBS 0679 to be a source of VHE photons at $6.9$ standard deviations ($\\sigma$). An unbinned likelihood analysis of the $0.1-100$ GeV data, binned in 28-day periods, finds both the flux and spectral index to be variable, with a `softer-when-brighter' trend in the global $\\gamma$-ray characteristics. On the other hand, the 28-day periods in which the VHE photons were detected have spectral indices that are consistent with the $5.3$ year average suggesting that the observed VHE emission is not associated with a spectral hardening event. The discovery of RBS 0679 in the $100-300$ GeV energy range, combined with the non-detection above 390 GeV with the H.E.S.S. telescope array, suggest RBS 0679 to be an intriguing source that requires further follow-up observations with ground-based $\\gamma$-ray observatories.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-10-07T12:52:19.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ray emission",
      "high energy",
      "likelihood analysis finding rbs",
      "vhe photon",
      "unbinned likelihood analysis finding"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1093/mnras/stu2321",
      "journal": "Monthly Notices of the Royal Astronomical Society",
      "year": 2014,
      "month": "Dec",
      "volume": 445,
      "number": 4,
      "pages": 4345
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1320742,
      "adsabs": "2014MNRAS.445.4345B"
    }
  }
}