{
  "abstract": "The Dark Energy Spectroscopic Instrument (DESI) is carrying out a five-year spectroscopic survey designed to map the large-scale structure of the Universe and obtain spectra for millions of galaxies and quasars over a wide redshift range. We present a value-added catalog of spectral properties for 1,717,774 unique quasars (1,774,723 spectra) in the DESI Data Release 1. We perform a uniform spectral decomposition of the quasar continuum, host galaxy emission (at $z<1$), and \\FeII\\ emission, and measure the line properties of major broad and narrow emission lines from Ly$α$ to H$α$ covered by DESI spectra. We also provide single-epoch black hole mass estimates (from H$β$, \\MgII, and \\CIV), bolometric luminosities, and Eddington ratios for these quasars. We provide systemic redshifts that account for the intrinsic velocity shifts of individual lines; they agree with the DESI pipeline redshifts to within 500~km s$^{-1}$ for 88.6\\% of the sample, and are most useful at $z>1$ where the pipeline redshift is heavily constrained by blueshifted high-ionization lines. We also provide local fits to several optical coronal lines, including \\NeV~$\\lambda3426$, [\\ion{Fe}{7}]~$\\lambda5722$, [\\ion{Fe}{7}]~$\\lambda6088$, and [\\ion{Fe}{11}]~$\\lambda7893$. We show that several emission-line ratios, including those involving coronal lines, vary systematically with Eddington ratio. The catalog is intended as a community resource for studies of quasar demographics, black hole accretion, emission-line physics, and the connection between the broad-, coronal-, and narrow-line regions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.31416",
  "author_total": 2,
  "authors": [
    {
      "name": "Qiaoya Wu"
    },
    {
      "name": "Yue Shen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4xh8f0z93x8fh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.31416",
  "fulltext_url": null,
  "id": "4xh8f0z93x8fh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.31416",
  "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.GA"
    ],
    [
      "openalex",
      "3103|Galaxies: Formation, Evolution, Phenomena"
    ]
  ],
  "openalex": "W7223289216",
  "pdf_url": "https://arxiv.org/pdf/2610.31416",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4xh8f0z93x8fh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2610.31416",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.31416"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    }
  ],
  "title": "A Catalog of Spectral Properties for DESI DR1 Quasars",
  "title_text": "A Catalog of Spectral Properties for DESI DR1 Quasars",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/4xh8f0z93x8fh",
  "venue": "arXiv",
  "versions": []
}