{
  "abstract": "Context: Wide-area radio continuum surveys require reliable optical and infrared counterpart identification, but high optical source densities and extended or multi-component radio morphologies make this challenging. Aims: We present optical and infrared counterpart catalogs for MeerKLASS L-band and UHF-band on-the-fly continuum sources using KiDS DR5 and DESI Legacy Imaging Surveys DR10 (LS DR10), including counterpart probabilities, redshifts, and host-galaxy properties. Methods: We developed the Stellar-mass Enhanced Density Association (SEDA) method, an empirical framework that compares candidate densities around radio positions with those in a position-displaced control catalog. For galaxies we use positional offset, stellar mass, and redshift; quasar candidates are treated separately using offset and mid-infrared selection. A second-pass search associates multi-component radio sources with common hosts. Results: In the L-band survey, we identify 20,400 KiDS-based counterparts with $P_{\\rm true}>0.5$, corresponding to 66% of L-band sources within the KiDS footprint. In the UHF-band survey, we identify 61,633 LS DR10 counterparts, corresponding to 81% of the radio sources. Spectroscopic redshifts are available for 22% and 44% of the L-band and UHF-band counterparts, respectively. The redshift distributions show low-redshift star-forming galaxies, intermediate-redshift radio galaxies, and a high-redshift tail dominated by quasars. SEDA also recovers rare radio-loud quasars, including QSO J2318-3113 at $z=6.44$ and UHF_DR1 J+111111.8+053626.6 at $z=5.24$. Conclusions: SEDA provides a data-driven route to counterpart identification for wide-area radio surveys with complex source morphologies. The catalogs enable future MeerKLASS studies of radio source populations, host-galaxy demographics, and rare high-redshift radio quasars.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.05923",
  "author_total": 10,
  "authors": [
    {
      "name": "M Klein"
    },
    {
      "name": "S Mangla"
    },
    {
      "name": "J Mohr"
    },
    {
      "name": "S Chatterjee"
    },
    {
      "name": "K Grainge"
    },
    {
      "name": "S Paul"
    },
    {
      "name": "M.G Santos"
    },
    {
      "name": "O.M Smirnov"
    },
    {
      "name": "C Tasse"
    },
    {
      "name": "L Wolz"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/axwh1mrzw2rx3.bib",
  "cited_by": 0,
  "doi": null,
  "fulltext_url": null,
  "id": "axwh1mrzw2rx3",
  "issns": [],
  "landing_url": "https://hal.science/hal-05737564v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://hal.science/hal-05737564/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/axwh1mrzw2rx3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:27Z",
      "native_id": "hal-05737564",
      "source": "hal",
      "url": "https://hal.science/hal-05737564v1"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "hal:1.phys.astr",
      "subfield": "general"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Optical Counterparts of MeerKLASS L-band and UHF-band surveys",
  "title_text": "Optical Counterparts of MeerKLASS L-band and UHF-band surveys",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:27Z",
  "url": "https://research.draconitic.com/paper/axwh1mrzw2rx3",
  "venue": "HAL",
  "versions": []
}