{
  "abstract": "X-ray flashes (XRFs) are a type of gamma-ray bursts (GRBs) with prompt emission predominantly below 30 keV poorly detected by previous missions. The advent of the SVOM mission, with its wide-field instrument ECLAIRs, provides a new way to detect soft X-ray transients such as XRFs. We present photometric and spectroscopic observations of XRF 241001A detected by SVOM, a soft, sub-luminous, and low-energetic burst located in a poorly populated region of the Amati relation. We investigate the origin of its faint, soft high-energy emission to assess its connection to the long GRB population. We analyze the SVOM/ECLAIRs prompt emission and model its afterglow emission from X-ray to-radio. We present JWST/NIRSpec and SVOM/VT observations of the associated supernova (SN 2024aiiq), which we model with an Arnett radioactive decay component and compare its properties with previously detected GRB/SNe. XRF 241001A is located at z = 0.573 and has a prompt emission dominated by photons below 20 keV with a duration of T90 = 3.14 seconds. Its spectrum can be modeled by non-thermal or thermal models, all pointing towards a low Epeak < 10 keV and Eiso ~ 8x10^49 erg. The X-ray-to-radio afterglow modeling favors an origin from a relativistic jet viewed on-axis. In the optical, XRF 241001A exhibits an early blue emission, similar to that detected in some fast X-ray transients and inconsistent with synchrotron emission. The JWST/NIRSpec observations firmly established its collapsar origin by revealing a SN Type Ic with broad lines, comparable to SN 1998bw and SN 2025kg-like events. XRF 241001A is a soft, low-luminosity collapsar event produced by a weak relativistic jet observed on-axis, supporting the view that part of the XRF population forms the low-energy tail of the long GRB population. It demonstrates the potential of SVOM/ECLAIRs to probe the soft regime of the high-energy transient population.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2604.20346",
  "author_total": 63,
  "authors": [
    {
      "name": "B Schneider"
    },
    {
      "name": "M Brunet"
    },
    {
      "name": "B.P Gompertz"
    },
    {
      "name": "D Turpin"
    },
    {
      "name": "D.B Malesani"
    },
    {
      "name": "O Godet"
    },
    {
      "name": "A.J Levan"
    },
    {
      "name": "F Daigne"
    },
    {
      "name": "N Sarin"
    },
    {
      "name": "N.A Rakotondrainibe"
    },
    {
      "name": "A Martin-Carrillo"
    },
    {
      "name": "J.T Palmerio"
    },
    {
      "name": "C.C Thöne"
    },
    {
      "name": "H.L Li"
    },
    {
      "name": "A Saccardi"
    },
    {
      "name": "A de Ugarte Postigo"
    },
    {
      "name": "S Antier"
    },
    {
      "name": "V Buat"
    },
    {
      "name": "D Ďurovčíková"
    },
    {
      "name": "L Izzo"
    },
    {
      "name": "J.K Leung"
    },
    {
      "name": "G Mo"
    },
    {
      "name": "Y.L Qiu"
    },
    {
      "name": "S.D Vergani"
    },
    {
      "name": "J Wang"
    },
    {
      "name": "J.Y Wei"
    },
    {
      "name": "L.P Xin"
    },
    {
      "name": "R Mochkovitch"
    },
    {
      "name": "B Zhang"
    },
    {
      "name": "H.B Cai"
    },
    {
      "name": "S Campana"
    },
    {
      "name": "A Coleiro"
    },
    {
      "name": "B Cordier"
    },
    {
      "name": "P d'Avanzo"
    },
    {
      "name": "N Dagoneau"
    },
    {
      "name": "V d'Elia"
    },
    {
      "name": "Y.W Dong"
    },
    {
      "name": "D Götz"
    },
    {
      "name": "S Guillot"
    },
    {
      "name": "X.H Han"
    },
    {
      "name": "D.H Hartmann"
    },
    {
      "name": "L Huang"
    },
    {
      "name": "Y.F Huang"
    },
    {
      "name": "P Jakobsson"
    },
    {
      "name": "A Klotz"
    },
    {
      "name": "C Lachaud"
    },
    {
      "name": "X.M Lu"
    },
    {
      "name": "P Maggi"
    },
    {
      "name": "M de Pasquale"
    },
    {
      "name": "F Piron"
    },
    {
      "name": "R Salvaterra"
    },
    {
      "name": "S Schanne"
    },
    {
      "name": "J Sollerman"
    },
    {
      "name": "N.R Tanvir"
    },
    {
      "name": "Z Vidadi"
    },
    {
      "name": "P Wang"
    },
    {
      "name": "C Wu"
    },
    {
      "name": "S.L Xiong"
    },
    {
      "name": "Y Xu"
    },
    {
      "name": "T Zafar"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dz2c0vw5ne4gn.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202660544",
  "fulltext_url": null,
  "id": "dz2c0vw5ne4gn",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://hal.science/hal-05614088v1",
  "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": [
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  "openalex": "W7201850279",
  "pdf_url": "https://hal.science/hal-05614088/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-05",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/dz2c0vw5ne4gn.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T12:20:13Z",
      "native_id": "hal-05614088",
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      "url": "https://hal.science/hal-05614088v1"
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "hal:2.sdu.astr.he",
      "subfield": "high-energy-astrophysics"
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    {
      "field": "earth",
      "origin": "hal:0.sdu",
      "subfield": "general"
    }
  ],
  "title": "XRF 241001A/SN 2024aiiq: A Faint Soft X-ray Transient Detected by SVOM with a Broad-Line Type Ic Supernova Revealed by JWST",
  "title_text": "XRF 241001A/SN 2024aiiq: A Faint Soft X-ray Transient Detected by SVOM with a Broad-Line Type Ic Supernova Revealed by JWST",
  "type": "peer-reviewed",
  "updated_at": "2026-11-07T12:20:25Z",
  "url": "https://research.draconitic.com/paper/dz2c0vw5ne4gn",
  "venue": "Astronomy & Astrophysics - A&A",
  "versions": []
}