{
  "abstract": "We present a homogenised K-band photometric catalogue for the central ${\\approx}12$ arcmin$^2$ (${\\approx}0.9$ kpc$^2$) of the Triangulum spiral galaxy M33, combining four independent PSF-based near-infrared datasets obtained with UKIRT between 2003 and 2018. These comprise the 2003-2007 UIST multi-epoch monitoring survey, the 2005 UFTI K-band mosaic (for which we present new PSF photometry), new WFCAM PSF reductions for the four central tiles, and a single K-band epoch from the 2018 UKIRT Hemisphere Survey (UHS DR3). Cross-matching all four catalogues and retaining stars detected in at least two of them yields 847 unique stars comprising 21,085 valid K-band measurements spanning a baseline of 15.11 yr. Photometric homogenisation onto the 2MASS/Vega system via 82 low-scatter calibration stars removes systematic inter-dataset offsets of up to 0.22 mag. Of the 847 monitored stars, 771 (91 per cent) are classified as variable ($σ_{\\rm rms} > 0.10$ mag), including 385 high-amplitude variables ($A_K \\geq 1.0$ mag): prime Mira-type long-period variable candidates for period determination. Cross-matching with archival Spitzer IRAC photometry yields 156 matched stars, of which 120 satisfy $\\langle K\\rangle - [3.6] > 0.5$ mag, identifying dust-enshrouded AGB candidates inaccessible to all-sky optical surveys. This catalogue constitutes the most extensive near-infrared photometric baseline assembled for AGB stars in any spiral galaxy beyond the Milky Way, providing the photometric foundation for the period-luminosity analysis and star-formation-history reconstruction in the companion Paper VIII. The full catalogue is available at the Centre de Données astronomiques de Strasbourg (CDS).",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.37591",
  "author_total": 6,
  "authors": [
    {
      "name": "Mina Alizadeh"
    },
    {
      "name": "Atefeh Javadi"
    },
    {
      "name": "Yousefali Abedini"
    },
    {
      "name": "Fatemeh Nikzat"
    },
    {
      "name": "Hedieh Abdollahi"
    },
    {
      "name": "Jacco Th. van Loon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ct013jkgd9zdn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.37591",
  "fulltext_url": null,
  "id": "ct013jkgd9zdn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.37591",
  "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.SR"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7224087182",
  "pdf_url": "https://arxiv.org/pdf/2610.37591",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ct013jkgd9zdn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:50Z",
      "native_id": "2610.37591",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.37591"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "The UKIRT M33 Monitoring Project - VII. A 15-year K-band photometric catalogue of long-period variable stars in the central kiloparsec of M33",
  "title_text": "The UKIRT M33 Monitoring Project - VII. A 15-year K-band photometric catalogue of long-period variable stars in the central kiloparsec of M33",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:50Z",
  "url": "https://research.draconitic.com/paper/ct013jkgd9zdn",
  "venue": "arXiv",
  "versions": []
}