{
  "abstract": "Wide-field surveys now report thousands of transients per month, while spectra are obtained for only a few per cent of them. We present DETECT (DESI--Transient Event Cross-matching Tool), a pipeline that turns each Transient Name Server (TNS) alert into a distance-informed candidate within an hour by placing it in the context of the Dark Energy Spectroscopic Instrument (DESI) archive. DETECT cross-matches every new report against the 22 million spectra of DESI EDR and DR1 through a HEALPix index, associates the transient with a host galaxy by a directional-light-radius rule whose morphology-dependent thresholds are calibrated on 4,474 supernovae with known redshifts (92.5% completeness, 0.4% wrong hosts), and passes ambiguous cases to a reviewer through a web interface. With a validated host redshift it derives the peak absolute magnitude, the projected offset and basic host properties of each event, and ranks it for spectroscopic follow-up. Applied retrospectively to ~1.2x10^5 TNS reports from 2020--2024, DETECT recovers a spectroscopic host for 15% of them, from these we build a Gold Sample of ~5,400 well-sampled light curves whose luminosity distributions by class reproduce those of untargeted surveys. Because the absolute magnitude is known at discovery, intrinsically overluminous events stand out immediately: in the prospective 2025 run this is how the lensed superluminous supernova SN~2025wny was flagged within hours of its report, and how faint, fast-declining kilonova candidates were screened against model grids and archival photometry. DETECT shows how an archival spectroscopic survey can make host redshifts a routine part of transient triage ahead of the Rubin Observatory's LSST.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28951",
  "author_total": 13,
  "authors": [
    {
      "name": "Yu-Hsing Lee"
    },
    {
      "name": "Ting-Wan Chen"
    },
    {
      "name": "Ze-Ning Wang"
    },
    {
      "name": "Sheng Yang"
    },
    {
      "name": "Limeng Deng"
    },
    {
      "name": "Chuan-Jui Li"
    },
    {
      "name": "K. C. Chambers"
    },
    {
      "name": "Thomas de Boer"
    },
    {
      "name": "Chien-Cheng Lin"
    },
    {
      "name": "Thomas B. Lowe"
    },
    {
      "name": "Paloma Mínguez"
    },
    {
      "name": "Gregory S. H. Paek"
    },
    {
      "name": "Richard Wainscoat"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4wsrkr9ytjnw3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28951",
  "fulltext_url": null,
  "id": "4wsrkr9ytjnw3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28951",
  "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.CO"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "openalex",
      "3103|Gamma-ray bursts and supernovae"
    ]
  ],
  "openalex": "W7214368726",
  "pdf_url": "https://arxiv.org/pdf/2609.28951",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-24",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4wsrkr9ytjnw3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.28951",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28951"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    }
  ],
  "title": "DETECT: Real-Time Identification of Transients with DESI Spectroscopic Redshift",
  "title_text": "DETECT: Real-Time Identification of Transients with DESI Spectroscopic Redshift",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/4wsrkr9ytjnw3",
  "venue": "arXiv",
  "versions": []
}