{
  "abstract": "Over the past two decades, the lack of an MeV $γ$-ray all-sky instrument has left an observational gap in blazar broadband emission. Recently, a new suite of MeV $γ$-ray instruments with sensitivity in the $10^{-11}$ to $10^{-12}$ $\\mathrm{erg/cm^{2}/s}$ range has been proposed, with the potential to far surpass the capabilities of previous all-sky MeV instruments. In this work, we forecast the capabilities of future MeV $γ$-ray instruments including COSI, GRAMS, newASTROGAM, and AMEGO-X to observe blazars. We pair total source count estimates of blazar luminosity functions with SED-modeled flux estimates of 76 blazars selected from a sample of 115 blazars cross-matched between the latest Fermi-LAT and Swift-BAT catalogs. We forecast that an instrument with a sensitivity limit of $10^{-11}$ $\\mathrm{erg/cm^{2}/s}$ could detect 61 of the 76 SED-modeled blazars, and expect a total population of a few tens to a few hundreds of Flat-Spectrum Radio Quasars (FSRQs), as well as a few hundred BL Lacs (BLLs). An instrument with a sensitivity limit of $10^{-12}$ $\\mathrm{erg/cm^{2}/s}$ could detect all 76 of the SED-modeled blazars, and we expect a total population of a few hundred to one thousand FSRQs and roughly one thousand BLLs. As MeV blazars have been observed to be extremely luminous and MeV $γ$-rays are minimally attenuated by the extragalactic background light, we use luminosity functions to estimate that blazars could be detected out to $z\\approx6$. Lastly, we demonstrate detectability for blazars that have been proposed as neutrino-emitting candidates, as the MeV regime could provide a window into resolving lepto-hadronic degeneracies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.26658",
  "author_total": 9,
  "authors": [
    {
      "name": "Timothy Wessling-Resnick"
    },
    {
      "name": "Naomi Tsuji"
    },
    {
      "name": "Tsuguo Aramaki"
    },
    {
      "name": "Paolo Coppi"
    },
    {
      "name": "Manel Errando"
    },
    {
      "name": "Yoshiyuki Inoue"
    },
    {
      "name": "Reshmi Mukherjee"
    },
    {
      "name": "Svanik Tandon"
    },
    {
      "name": "Jiancheng Zeng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0g00ynpf6m1fs.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.26658",
  "fulltext_url": null,
  "id": "0g00ynpf6m1fs",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.26658",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "openalex",
      "3106|Astrophysics and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7223052323",
  "pdf_url": "https://arxiv.org/pdf/2610.26658",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0g00ynpf6m1fs.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.26658",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.26658"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Detection Forecasting for Blazars at MeV Energies with Fermi-LAT Swift-BAT Cross Match",
  "title_text": "Detection Forecasting for Blazars at MeV Energies with Fermi-LAT Swift-BAT Cross Match",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/0g00ynpf6m1fs",
  "venue": "arXiv",
  "versions": []
}