{
  "abstract": "Binary neutron star mergers are key targets for multimessenger astronomy, motivating future upgrades of gravitational-wave detectors. For KAGRA, both broadband sensitivity improvements that increase the binary neutron star detection range, and high-frequency optimizations targeting neutron-star physics are under consideration. We present a computationally efficient framework to evaluate the multimessenger performance of detector upgrades by combining Fisher-matrix estimates of localization area and localization volume with detector duty factors and binary neutron star merger rates. We apply this framework to proposed KAGRA upgrade scenarios within the LIGO-Virgo-KAGRA network. For identical sources, the high-frequency upgrade improves sky localization by about 20% compared with the broadband option. However, when detection rates are taken into account, the broadband upgrade yields a larger number of well-localized events. Despite its shorter binary neutron star range than the other detectors, the inclusion of KAGRA increases the number of events localized within $10^3$ Mpc$^3$ volume by about 60%. These results provide a quantitative framework for evaluating future detector upgrades from the perspective of multimessenger observations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Classical and Quantum Gravity 43, 195007 (2026)",
  "arxiv": "2607.12769",
  "author_total": 4,
  "authors": [
    {
      "name": "Yuta Michimura"
    },
    {
      "name": "Soichiro Morisaki"
    },
    {
      "name": "Kenta Hotokezaka"
    },
    {
      "name": "Masaomi Tanaka"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f63vatmgfannc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.12769",
  "fulltext_url": null,
  "id": "f63vatmgfannc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.12769",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "physics.ins-det"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.12769",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f63vatmgfannc.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:15Z",
      "native_id": "2607.12769",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.12769"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.ins-det",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Evaluating KAGRA upgrade scenarios for multimessenger observations of binary neutron stars",
  "title_text": "Evaluating KAGRA upgrade scenarios for multimessenger observations of binary neutron stars",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:50Z",
  "url": "https://research.draconitic.com/paper/f63vatmgfannc",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1088/1361-6382/aeaa9c",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}