{
  "id": "2306.00960",
  "version": "v1",
  "published": "2023-06-01T17:55:08.000Z",
  "updated": "2023-06-01T17:55:08.000Z",
  "title": "Hard X-ray emission from blazars associated with high-energy neutrinos",
  "authors": [
    "A. V. Plavin",
    "R. A. Burenin",
    "Y. Y. Kovalev",
    "A. A. Lutovinov",
    "A. A. Starobinsky",
    "S. V. Troitsky",
    "E. I. Zakharov"
  ],
  "comment": "9 pages, 8 figures, 2 tables; submitted to MNRAS",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "Bright blazars were found to be prominent neutrino sources, and a number of IceCube events were associated with them. Evaluating high-energy photon emission of such blazars is crucial for better understanding of the processes and regions where neutrinos are produced. Here, we focus on hard X-ray emission observed by the SRG/ART-XC telescope, by the Swift/BAT imager, and by the INTEGRAL/IBIS telescope. Their energy range ~10 keV and above is well-suited for probing photons that potentially participate in neutrino production by interacting with ultrarelativistic protons. We find that neutrino-associated blazars tend to demonstrate remarkably strong X-ray emission compared to other VLBI blazars in the sky, chance coincidence probability is p=0.5%. Both neutrinos and hard X-rays are found to come from blazars at cosmological distances z ~ 1, and are boosted by relativistic beaming that makes it possible to detect them on Earth. Our results suggest that neutrinos are produced within compact blazar jets, with target X-ray photons emitted from accelerated jet regions.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-06-01T17:55:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hard x-ray emission",
      "high-energy neutrinos",
      "demonstrate remarkably strong x-ray emission",
      "target x-ray photons",
      "prominent neutrino sources"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}