{
  "abstract": "We present five technical validations of SCUBA-2/POL-2 polarimetry on the James Clerk Maxwell Telescope at 450 and 850 $μ$m, using 174 archival fields in 69 molecular cloud regions and subsets appropriate to each test. Extended-source calibration avoids a deterministic shift of $Δβ=-1.05$ in the dust emissivity index $β$ that would result from calibrating extended emission using peak brightness. We modeled Stokes $I$ noise with additive and signal-dependent components. The measured median ratio of surface-brightness noise at 450/850 $μ$m is 25. Independent tests of Stokes $Q,U$ noise support approximately equal additive variances and weak error correlations, providing a basis for propagating polarization uncertainties. Corrections determined for individual fields reduce additive zero-level offsets of order $1$ mJy arcsec$^{-2}$ in the 450 $μ$m Stokes $Q$ and $U$ intensities. The three-step regression leaves a median combined residual amplitude of $0.07$ mJy arcsec$^{-2}$. Independent comparisons with SOFIA/HAWC+ at 154 and 214 $μ$m support the correction in strongly affected fields. We matched the 450 $μ$m maps to the modeled 850 $μ$m beam and the common $12.6''$-$300''$ range of angular scales. We compared three reductions of the same 450 $μ$m observations across 30 sources. Taking the median angular residual relative to the final product for each source, we find that beam matching reduces the median over sources from $6.3^\\circ$ to $4.7^\\circ$. After matching, 29 of the 30 sources have median residuals below $10^\\circ$. We also quantified how residual $Q/U$ offsets propagate in ratios of polarization fractions, differences in spectral indices, and polarization angles. These validations provide procedures and quantitative references for interpreting POL-2 measurements and combining them with polarimetry at other wavelengths.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.29273",
  "author_total": 62,
  "authors": [
    {
      "name": "Ray S. Furuya"
    },
    {
      "name": "David Berry"
    },
    {
      "name": "Pierre Bastien"
    },
    {
      "name": "Tetsuo Hasegawa"
    },
    {
      "name": "Masafumi Matsumura"
    },
    {
      "name": "Koji Kawabata"
    },
    {
      "name": "Kazunari Iwasaki"
    },
    {
      "name": "Per Friberg"
    },
    {
      "name": "Simon Coudé"
    },
    {
      "name": "Lapo Fanciullo"
    },
    {
      "name": "Thiem Hoang"
    },
    {
      "name": "Yasuo Doi"
    },
    {
      "name": "Hua-bai Li"
    },
    {
      "name": "Jia-Wei Wang"
    },
    {
      "name": "Tao-Chung Ching"
    },
    {
      "name": "Hiroko Shinnaga"
    },
    {
      "name": "Hiroyuki Nakanishi"
    },
    {
      "name": "Sarah Graves"
    },
    {
      "name": "A-Ran Lyo"
    },
    {
      "name": "Junhao Liu"
    },
    {
      "name": "Janik Karoly"
    },
    {
      "name": "Jihye Hwang"
    },
    {
      "name": "Glenn J. White"
    },
    {
      "name": "Doris Arzoumanian"
    },
    {
      "name": "Sarah Sadavoy"
    },
    {
      "name": "Kohji Tomisaka"
    },
    {
      "name": "Pham Ngoc Diep"
    },
    {
      "name": "Mehrnoosh Tahani"
    },
    {
      "name": "Nguyen Bich Ngoc"
    },
    {
      "name": "Archana Soam"
    },
    {
      "name": "Hsi-Wei Yen"
    },
    {
      "name": "Chakali Eswaraiah"
    },
    {
      "name": "Vera Könyves"
    },
    {
      "name": "Jeong-Eun Lee"
    },
    {
      "name": "Valentin J. M. Le Gouellec"
    },
    {
      "name": "Ekta Sharma"
    },
    {
      "name": "Le Ngoc Tram"
    },
    {
      "name": "Frédérick Poidevin"
    },
    {
      "name": "Tie Liu"
    },
    {
      "name": "Mark Rawlings"
    },
    {
      "name": "Najimudeen Bijas"
    },
    {
      "name": "Fumitaka Nakamura"
    },
    {
      "name": "Rachel Friesen"
    },
    {
      "name": "Jean-François Robitaille"
    },
    {
      "name": "Yoshiaki Misugi"
    },
    {
      "name": "Raiga Kashiwagi"
    },
    {
      "name": "Takashi Onaka"
    },
    {
      "name": "Motohide Tamura"
    },
    {
      "name": "Harriet Parsons"
    },
    {
      "name": "Tyler L. Bourke"
    },
    {
      "name": "David Eden"
    },
    {
      "name": "Huei-Ru Vivien Chen"
    },
    {
      "name": "Nagayoshi Ohashi"
    },
    {
      "name": "Jongsoo Kim"
    },
    {
      "name": "Shih-Ping Lai"
    },
    {
      "name": "Keping Qiu"
    },
    {
      "name": "Di Li"
    },
    {
      "name": "Woojin Kwon"
    },
    {
      "name": "Shu-ichiro Inutsuka"
    },
    {
      "name": "Kate Pattle"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4y8w3st9f9r5v.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.29273",
  "fulltext_url": null,
  "id": "4y8w3st9f9r5v",
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  "landing_url": "https://arxiv.org/abs/2610.29273",
  "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.GA"
    ],
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "openalex",
      "3103|Astrophysics and Star Formation Studies"
    ]
  ],
  "openalex": "W7223210539",
  "pdf_url": "https://arxiv.org/pdf/2610.29273",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4y8w3st9f9r5v.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:19Z",
      "native_id": "2610.29273",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.29273"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    }
  ],
  "title": "B-fields In STar-forming Region Observations (BISTRO): Technical Foundations for Quantitative 450/850 $μ$m JCMT SCUBA-2/POL-2 Polarimetry",
  "title_text": "B-fields In STar-forming Region Observations (BISTRO): Technical Foundations for Quantitative 450/850 μm JCMT SCUBA-2/POL-2 Polarimetry",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:19Z",
  "url": "https://research.draconitic.com/paper/4y8w3st9f9r5v",
  "venue": "arXiv",
  "versions": []
}