{
  "abstract": "We present LensFactory.jl, an efficient, open-source, general-purpose strong lens modeling package written in Julia. It supports single- and multi-plane lensing with a wide range of analytic lens profiles, and its modular design, built on Julia's multiple dispatch, makes it straightforward to add new profiles or inference methods, while native multi-threading parallelizes the computationally expensive steps, enabling full cluster-scale lens reconstructions within hours on a desktop-class machine. We validate the mass-reconstruction pipeline of LensFactory.jl on two simulated galaxy clusters (Ares and Hera), recovering the convergence and magnification maps well where the lensing constraints lie, and on the JWST-observed cluster SMACS J0723.3-7327, obtaining a strong lens model (image-plane RMS of 0.46'') consistent with previously published results. In addition, we introduce singularity maps as a complementary diagnostic for comparing lens models, probing differences in the higher-order derivatives of the lensing potential, which remain largely unconstrained by standard observables such as image positions, time delays, and flux ratios. LensFactory.jl is accompanied by a set of worked examples covering all core functionality.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08649",
  "author_total": 1,
  "authors": [
    {
      "name": "Ashish Kumar Meena"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9m2qs2xjtnr12.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08649",
  "fulltext_url": null,
  "id": "9m2qs2xjtnr12",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08649",
  "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"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.08649",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9m2qs2xjtnr12.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2609.08649",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08649"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    }
  ],
  "title": "$\\texttt{LensFactory.jl}$: A general-purpose strong lens modeling package",
  "title_text": "LensFactory.jl: A general-purpose strong lens modeling package",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/9m2qs2xjtnr12",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1007/s12036-026-10197-6",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}