{
  "abstract": "We report the independent discovery of the cataclysmic variable (CV) SPLUS J102139.31-282247.5 using Southern Photometric Local Universe Survey 12 band photometry, following its initial identification via ASAS-SN variability. Here, we investigate the system using optical photometry alongside optical and X-ray spectroscopy. High-cadence optical light curves from publicly available TESS data and a dedicated campaign at the Pico dos Dias Observatory in Brazil revealed a highly inclined system exhibiting pronounced eclipses with an orbital period of 1.81 hours. We found no evidence of a WD spin period. Despite seasonal gaps, the long-term ASAS-SN light curve revealed several outbursts (15 with $Δ$mag $\\sim$ 1.5 brighter than the mean magnitude) and one superoutburst over the past decade. During Swift X-ray telescope observations, the system exhibited X-ray luminosity of $8.5 \\times 10^{31}$ erg s$^{-1}$ in the 0.3-10\\,keV band, originating from thermal plasma emission at a temperature consistent with accretion shocks. Optical spectroscopy from the Gemini Multi-Object Spectrographs on the Gemini South telescope confirms the CV nature of the system, showing strong, double-peaked H and HeI emission lines alongside a weak HeII4686 line. Altogether, these features strongly support the classification of SPLUS J102139.31-282247.5 as a quiescent, eclipsing dwarf nova with an unusually high X-ray luminosity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.22790",
  "author_total": 8,
  "authors": [
    {
      "name": "Amanda Silva de Araujo"
    },
    {
      "name": "Raimundo Lopes de Oliveira"
    },
    {
      "name": "Koji Mukai"
    },
    {
      "name": "Raymundo Baptista"
    },
    {
      "name": "Albert Bruch"
    },
    {
      "name": "Romualdo Eleuterio"
    },
    {
      "name": "Angela Krabbe"
    },
    {
      "name": "Claudia Mendes de Oliveira"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dyh6ty3j5qxm2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.22790",
  "fulltext_url": null,
  "id": "dyh6ty3j5qxm2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.22790",
  "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.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7222947700",
  "pdf_url": "https://arxiv.org/pdf/2610.22790",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dyh6ty3j5qxm2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:32Z",
      "native_id": "2610.22790",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.22790"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "A Multiwavelength View of SPLUS J102139.31-282247.5: an X-ray Luminous and Eclipsing Dwarf Nova",
  "title_text": "A Multiwavelength View of SPLUS J102139.31-282247.5: an X-ray Luminous and Eclipsing Dwarf Nova",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:28Z",
  "url": "https://research.draconitic.com/paper/dyh6ty3j5qxm2",
  "venue": "arXiv",
  "versions": []
}