{
  "abstract": "Be/X-ray binaries provide a unique opportunity to study the interaction between neutron stars and circumstellar discs. SXP 5.05 is a particularly rare system, exhibiting eclipse-like X-ray variability attributed to obscuration by the Be star disc rather than a simple stellar eclipse. Motivated by its unusual geometry and the well-studied 2013 outburst, we present a multiwavelength analysis of its 2024 outburst using NICER X-ray observations and long-term optical monitoring from OGLE. The X-ray light curve shows a declining outburst with lower peak intensity and shorter duration compared to 2013, indicating a reduced accretion episode. The spectral evolution, characterized through hardness ratios, reveals a transition from a soft, high-intensity state to a harder, low-intensity state. Coherent pulsations near 5.05 s are detected throughout the observations, with properties consistent with previous measurements. The optical light curves show a reduced variability amplitude relative to 2013, possibly from a less extended or less dense circumstellar disc. Orbital-phase-folded optical profiles reveal a persistent, phase-locked dip structure, indicating a stable non-axisymmetric disc component that evolves across outburst phases. Together, these results support a picture in which the observed variability is driven by changes in disc structure and viewing geometry. SXP 5.05 thus remains a key system for probing the time-dependent properties of Be star discs through combined X-ray and optical observations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: J. High Energy Astrophys. (2026) 100758",
  "arxiv": "2607.19373",
  "author_total": 6,
  "authors": [
    {
      "name": "Chintan Patel"
    },
    {
      "name": "Sayantan Bhattacharya"
    },
    {
      "name": "Karan Akbari"
    },
    {
      "name": "Rajapandi Nadar"
    },
    {
      "name": "Sudip Bhattacharyya"
    },
    {
      "name": "Manojendu Choudhury"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0a8n0ywdhtpr8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.19373",
  "fulltext_url": null,
  "id": "0a8n0ywdhtpr8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.19373",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.19373",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0a8n0ywdhtpr8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2607.19373",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.19373"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Circumstellar Disc and X-ray Variability in the Be/X-ray Binary SXP 5.05 During its 2024 Outburst",
  "title_text": "Circumstellar Disc and X-ray Variability in the Be/X-ray Binary SXP 5.05 During its 2024 Outburst",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/0a8n0ywdhtpr8",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1016/j.jheap.2026.100758",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}