{
  "abstract": "We present DragonflyPol, a wide-field optical linear polarimetry capability implemented on the Dragonfly Telephoto Array. DragonflyPol leverages Dragonfly's modular, multi-lens architecture to obtain simultaneous measurements in four linear polarization orientations ($0^\\circ$, $45^\\circ$, $90^\\circ$, and $135^\\circ$) across a $\\sim5\\,deg^2$ field of view, distributed across 44 polarized lens--detector units. Four additional units serve as unpolarized reference channels. We describe a broad range of science goals enabled by this capability, including magnetic field mapping and tomography, dust grain properties, CMB foreground characterization, and the three-dimensional structure of diffuse interstellar clouds. We integrate Canon polarizers and Baader Sloan $r'$ bandpass filters into the drop-in filter holders of the Canon lenses, and conduct a three-phase laboratory characterization program to select optimal polarimetric components, measure contrast ratios and transmission efficiencies, and determine and mark the transmission axis of each polarizer with sub-degree repeatability. Laboratory measurements across all 44 deployed polarizers yield a mean noise-subtracted contrast ratio of $1228 \\pm 104$ and a single-polarizer transmission efficiency of $\\sim$33\\% in the $r'$ band. On-sky commissioning, including twilight flat-field characterization and twilight-sky polarization measurements, confirms throughput stability across polarization groups and successful recovery of the expected Rayleigh scattering signal. DragonflyPol achieved first polarimetric light in September 2025.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.14258",
  "author_total": 12,
  "authors": [
    {
      "name": "Mehrnoosh Tahani"
    },
    {
      "name": "Leo Hollberg"
    },
    {
      "name": "Hiroshi Akitaya"
    },
    {
      "name": "Jaeyeon Kim"
    },
    {
      "name": "Deborah Lokhorst"
    },
    {
      "name": "Roberto Abraham"
    },
    {
      "name": "Pieter van Dokkum"
    },
    {
      "name": "William P. Bowman"
    },
    {
      "name": "Vishwa Koshene Gamage"
    },
    {
      "name": "Paras Regmi"
    },
    {
      "name": "Yasuo Doi"
    },
    {
      "name": "Koji S. Kawabata"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0rv1b9nsjwr8g.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.14258",
  "fulltext_url": null,
  "id": "0rv1b9nsjwr8g",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.14258",
  "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.IM"
    ],
    [
      "openalex",
      "3105|Astronomy and Astrophysical Research"
    ]
  ],
  "openalex": "W7169571026",
  "pdf_url": "https://arxiv.org/pdf/2607.14258",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0rv1b9nsjwr8g.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2607.14258",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.14258"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    }
  ],
  "title": "DragonflyPol: Wide-Field Optical Linear Polarimetry with the Dragonfly Telephoto Array (Instrument Description and Commissioning)",
  "title_text": "DragonflyPol: Wide-Field Optical Linear Polarimetry with the Dragonfly Telephoto Array (Instrument Description and Commissioning)",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/0rv1b9nsjwr8g",
  "venue": "arXiv",
  "versions": []
}