SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization

B. Cordier; J. Y. Wei; N. R. Tanvir; S. D. Vergani; D. B. Malesani; J. P.U. Fynbo; A. de Ugarte Postigo; A. Saccardi; F. Daigne; J. L. Atteia; O. Godet; D. Götz; Y. L. Qiu; S. Schanne; L. P. Xin; B. Zhang; S. N. Zhang; A. J. Nayana; L. Piro; H. Fausey; B. Schneider; A. J. Levan; A. L. Thakur; Z. P. Zhu; G. Corcoran; N. A. Rakotondrainibe; V. D’Elia; D. Turpin; J. F. Agüí Fernández; M. A. Aloy; J. An; M. Bai; S. Basa; M. G. Bernardini; A. Bochenek; R. Brivio; M. Brunet; G. Bruni; S. B. Cenko; Q. Cheng; A. Chrimes; L. Christensen; A. Claret; A. Coleiro; L. Cotter; S. Crepaldi; J. S. Deng; Dimple; Y. W. Dong; D. Dornic; P. A. Evans; R. A.J. Eyles-Ferris; M. Ferro; L. Galbany; M. Garnichey; G. Gianfagna; B. P. Gompertz; H. Goto; N. Habeeb; P. Y. Han; X. H. Han; D. H. Hartmann; K. E. Heintz; J. Y. Hu; M. H. Huang; L. Izzo; P. Jakobsson; J. A. Kennea; C. Lachaud; T. Laskar; D. Li; H. L. Li; R. Z. Li; X. Liu; Y. Liu; G. Lombardi; H. Louvin; P. Maggi; T. Maiolino; Q. Y. Mao; A. Martin-Carrillo; K. Mercier; P. O’Brien; J. T. Palmerio; P. Petitjean; D. L.A. Pieterse; F. Piron; G. Pugliese; B. C. Rayson; T. Reynolds; F. Robinet; A. Rossi; R. Salvaterra; C. C. Thöne; B. Topçu; C. W. Wang; J. Wang; Y. Wang; C. Wu; S. L. Xiong; D. Xu; H. N. Yang; W. M. Yuan; Y. H. Zhang; X. F. Zhang; S. J. Zheng

doi:10.1051/0004-6361/202556580

SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization

B. Cordier
, J. Y. Wei
, N. R. Tanvir
, S. D. Vergani
, D. B. Malesani
, J. P.U. Fynbo
, A. de Ugarte Postigo
, A. Saccardi
, F. Daigne
, J. L. Atteia
, O. Godet
, D. Götz
, Y. L. Qiu
, S. Schanne
, L. P. Xin
, B. Zhang
, S. N. Zhang
, A. J. Nayana
, L. Piro
, H. Fausey

B. Schneider, A. J. Levan, A. L. Thakur, Z. P. Zhu, G. Corcoran, N. A. Rakotondrainibe, V. D’Elia, D. Turpin, J. F. Agüí Fernández, M. A. Aloy, J. An, M. Bai, S. Basa, M. G. Bernardini, A. Bochenek, R. Brivio, M. Brunet, G. Bruni, S. B. Cenko, Q. Cheng, A. Chrimes, L. Christensen, A. Claret, A. Coleiro, L. Cotter, S. Crepaldi, J. S. Deng, Dimple, Y. W. Dong, D. Dornic, P. A. Evans, R. A.J. Eyles-Ferris, M. Ferro, L. Galbany, M. Garnichey, G. Gianfagna, B. P. Gompertz, H. Goto, N. Habeeb, P. Y. Han, X. H. Han, D. H. Hartmann, K. E. Heintz, J. Y. Hu, M. H. Huang, L. Izzo, P. Jakobsson, J. A. Kennea, C. Lachaud, T. Laskar, D. Li, H. L. Li, R. Z. Li, X. Liu, Y. Liu, G. Lombardi, H. Louvin, P. Maggi, T. Maiolino, Q. Y. Mao, A. Martin-Carrillo, K. Mercier, P. O’Brien, J. T. Palmerio, P. Petitjean, D. L.A. Pieterse, F. Piron, G. Pugliese, B. C. Rayson, T. Reynolds, F. Robinet, A. Rossi, R. Salvaterra, C. C. Thöne, B. Topçu, C. W. Wang, J. Wang, Y. Wang, C. Wu, S. L. Xiong, D. Xu, H. N. Yang, W. M. Yuan, Y. H. Zhang, X. F. Zhang, S. J. Zheng

Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Most long gamma-ray bursts (LGRBs) originate from a rare type of massive stellar explosion. Their afterglows, while rapidly fading, can initially be extremely luminous at optical and near-infrared wavelengths, making them detectable at large cosmological distances. Here we report the detection and observations of GRB 250314A by the SVOM satellite and the subsequent follow-up campaign that led to the discovery of the near-infrared afterglow and spectroscopic measurements of its redshift z ≃ 7.3. This burst occurred when the Universe was only about 5% of its current age. We discuss the signature of these rare events within the context of the SVOM operating model and the ways to optimise their identification with adapted ground follow-up observation strategies.

Original language	English (US)
Article number	L7
Journal	Astronomy and Astrophysics
Volume	704
DOIs	https://doi.org/10.1051/0004-6361/202556580
State	Published - Dec 1 2025

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361/202556580

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Cordier, B., Wei, J. Y., Tanvir, N. R., Vergani, S. D., Malesani, D. B., Fynbo, J. P. U., de Ugarte Postigo, A., Saccardi, A., Daigne, F., Atteia, J. L., Godet, O., Götz, D., Qiu, Y. L., Schanne, S., Xin, L. P., Zhang, B., Zhang, S. N., Nayana, A. J., Piro, L., ... Zheng, S. J. (2025). SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization. Astronomy and Astrophysics, 704, Article L7. https://doi.org/10.1051/0004-6361/202556580

@article{64c8e5aeb7d240f1a04b955eef3faf63,

title = "SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization",

abstract = "Most long gamma-ray bursts (LGRBs) originate from a rare type of massive stellar explosion. Their afterglows, while rapidly fading, can initially be extremely luminous at optical and near-infrared wavelengths, making them detectable at large cosmological distances. Here we report the detection and observations of GRB 250314A by the SVOM satellite and the subsequent follow-up campaign that led to the discovery of the near-infrared afterglow and spectroscopic measurements of its redshift z ≃ 7.3. This burst occurred when the Universe was only about 5\% of its current age. We discuss the signature of these rare events within the context of the SVOM operating model and the ways to optimise their identification with adapted ground follow-up observation strategies.",

author = "B. Cordier and Wei, \{J. Y.\} and Tanvir, \{N. R.\} and Vergani, \{S. D.\} and Malesani, \{D. B.\} and Fynbo, \{J. P.U.\} and \{de Ugarte Postigo\}, A. and A. Saccardi and F. Daigne and Atteia, \{J. L.\} and O. Godet and D. G{\"o}tz and Qiu, \{Y. L.\} and S. Schanne and Xin, \{L. P.\} and B. Zhang and Zhang, \{S. N.\} and Nayana, \{A. J.\} and L. Piro and H. Fausey and B. Schneider and Levan, \{A. J.\} and Thakur, \{A. L.\} and Zhu, \{Z. P.\} and G. Corcoran and Rakotondrainibe, \{N. A.\} and V. D{\textquoteright}Elia and D. Turpin and \{Ag{\"u}{\'i} Fern{\'a}ndez\}, \{J. F.\} and Aloy, \{M. A.\} and J. An and M. Bai and S. Basa and Bernardini, \{M. G.\} and A. Bochenek and R. Brivio and M. Brunet and G. Bruni and Cenko, \{S. B.\} and Q. Cheng and A. Chrimes and L. Christensen and A. Claret and A. Coleiro and L. Cotter and S. Crepaldi and Deng, \{J. S.\} and Dimple and Dong, \{Y. W.\} and D. Dornic and Evans, \{P. A.\} and Eyles-Ferris, \{R. A.J.\} and M. Ferro and L. Galbany and M. Garnichey and G. Gianfagna and Gompertz, \{B. P.\} and H. Goto and N. Habeeb and Han, \{P. Y.\} and Han, \{X. H.\} and Hartmann, \{D. H.\} and Heintz, \{K. E.\} and Hu, \{J. Y.\} and Huang, \{M. H.\} and L. Izzo and P. Jakobsson and Kennea, \{J. A.\} and C. Lachaud and T. Laskar and D. Li and Li, \{H. L.\} and Li, \{R. Z.\} and X. Liu and Y. Liu and G. Lombardi and H. Louvin and P. Maggi and T. Maiolino and Mao, \{Q. Y.\} and A. Martin-Carrillo and K. Mercier and P. O{\textquoteright}Brien and Palmerio, \{J. T.\} and P. Petitjean and Pieterse, \{D. L.A.\} and F. Piron and G. Pugliese and Rayson, \{B. C.\} and T. Reynolds and F. Robinet and A. Rossi and R. Salvaterra and Th{\"o}ne, \{C. C.\} and B. Top{\c c}u and Wang, \{C. W.\} and J. Wang and Y. Wang and C. Wu and Xiong, \{S. L.\} and D. Xu and Yang, \{H. N.\} and Yuan, \{W. M.\} and Zhang, \{Y. H.\} and Zhang, \{X. F.\} and Zheng, \{S. J.\}",

note = "Publisher Copyright: {\textcopyright}The Authors 2025.",

year = "2025",

month = dec,

day = "1",

doi = "10.1051/0004-6361/202556580",

language = "English (US)",

volume = "704",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Cordier, B, Wei, JY, Tanvir, NR, Vergani, SD, Malesani, DB, Fynbo, JPU, de Ugarte Postigo, A, Saccardi, A, Daigne, F, Atteia, JL, Godet, O, Götz, D, Qiu, YL, Schanne, S, Xin, LP, Zhang, B, Zhang, SN, Nayana, AJ, Piro, L, Fausey, H, Schneider, B, Levan, AJ, Thakur, AL, Zhu, ZP, Corcoran, G, Rakotondrainibe, NA, D’Elia, V, Turpin, D, Agüí Fernández, JF, Aloy, MA, An, J, Bai, M, Basa, S, Bernardini, MG, Bochenek, A, Brivio, R, Brunet, M, Bruni, G, Cenko, SB, Cheng, Q, Chrimes, A, Christensen, L, Claret, A, Coleiro, A, Cotter, L, Crepaldi, S, Deng, JS, Dimple, Dong, YW, Dornic, D, Evans, PA, Eyles-Ferris, RAJ, Ferro, M, Galbany, L, Garnichey, M, Gianfagna, G, Gompertz, BP, Goto, H, Habeeb, N, Han, PY, Han, XH, Hartmann, DH, Heintz, KE, Hu, JY, Huang, MH, Izzo, L, Jakobsson, P, Kennea, JA, Lachaud, C, Laskar, T, Li, D, Li, HL, Li, RZ, Liu, X, Liu, Y, Lombardi, G, Louvin, H, Maggi, P, Maiolino, T, Mao, QY, Martin-Carrillo, A, Mercier, K, O’Brien, P, Palmerio, JT, Petitjean, P, Pieterse, DLA, Piron, F, Pugliese, G, Rayson, BC, Reynolds, T, Robinet, F, Rossi, A, Salvaterra, R, Thöne, CC, Topçu, B, Wang, CW, Wang, J, Wang, Y, Wu, C, Xiong, SL, Xu, D, Yang, HN, Yuan, WM, Zhang, YH, Zhang, XF & Zheng, SJ 2025, 'SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization', Astronomy and Astrophysics, vol. 704, L7. https://doi.org/10.1051/0004-6361/202556580

TY - JOUR

T1 - SVOM GRB 250314A at z ≃ 7.3

T2 - An exploding star in the era of re-ionization

AU - Cordier, B.

AU - Wei, J. Y.

AU - Tanvir, N. R.

AU - Vergani, S. D.

AU - Malesani, D. B.

AU - Fynbo, J. P.U.

AU - de Ugarte Postigo, A.

AU - Saccardi, A.

AU - Daigne, F.

AU - Atteia, J. L.

AU - Godet, O.

AU - Götz, D.

AU - Qiu, Y. L.

AU - Schanne, S.

AU - Xin, L. P.

AU - Zhang, B.

AU - Zhang, S. N.

AU - Nayana, A. J.

AU - Piro, L.

AU - Fausey, H.

AU - Schneider, B.

AU - Levan, A. J.

AU - Thakur, A. L.

AU - Zhu, Z. P.

AU - Corcoran, G.

AU - Rakotondrainibe, N. A.

AU - D’Elia, V.

AU - Turpin, D.

AU - Agüí Fernández, J. F.

AU - Aloy, M. A.

AU - An, J.

AU - Bai, M.

AU - Basa, S.

AU - Bernardini, M. G.

AU - Bochenek, A.

AU - Brivio, R.

AU - Brunet, M.

AU - Bruni, G.

AU - Cenko, S. B.

AU - Cheng, Q.

AU - Chrimes, A.

AU - Christensen, L.

AU - Claret, A.

AU - Coleiro, A.

AU - Cotter, L.

AU - Crepaldi, S.

AU - Deng, J. S.

AU - Dimple,

AU - Dong, Y. W.

AU - Dornic, D.

AU - Evans, P. A.

AU - Eyles-Ferris, R. A.J.

AU - Ferro, M.

AU - Galbany, L.

AU - Garnichey, M.

AU - Gianfagna, G.

AU - Gompertz, B. P.

AU - Goto, H.

AU - Habeeb, N.

AU - Han, P. Y.

AU - Han, X. H.

AU - Hartmann, D. H.

AU - Heintz, K. E.

AU - Hu, J. Y.

AU - Huang, M. H.

AU - Izzo, L.

AU - Jakobsson, P.

AU - Kennea, J. A.

AU - Lachaud, C.

AU - Laskar, T.

AU - Li, D.

AU - Li, H. L.

AU - Li, R. Z.

AU - Liu, X.

AU - Liu, Y.

AU - Lombardi, G.

AU - Louvin, H.

AU - Maggi, P.

AU - Maiolino, T.

AU - Mao, Q. Y.

AU - Martin-Carrillo, A.

AU - Mercier, K.

AU - O’Brien, P.

AU - Palmerio, J. T.

AU - Petitjean, P.

AU - Pieterse, D. L.A.

AU - Piron, F.

AU - Pugliese, G.

AU - Rayson, B. C.

AU - Reynolds, T.

AU - Robinet, F.

AU - Rossi, A.

AU - Salvaterra, R.

AU - Thöne, C. C.

AU - Topçu, B.

AU - Wang, C. W.

AU - Wang, J.

AU - Wang, Y.

AU - Wu, C.

AU - Xiong, S. L.

AU - Xu, D.

AU - Yang, H. N.

AU - Yuan, W. M.

AU - Zhang, Y. H.

AU - Zhang, X. F.

AU - Zheng, S. J.

PY - 2025/12/1

Y1 - 2025/12/1

N2 - Most long gamma-ray bursts (LGRBs) originate from a rare type of massive stellar explosion. Their afterglows, while rapidly fading, can initially be extremely luminous at optical and near-infrared wavelengths, making them detectable at large cosmological distances. Here we report the detection and observations of GRB 250314A by the SVOM satellite and the subsequent follow-up campaign that led to the discovery of the near-infrared afterglow and spectroscopic measurements of its redshift z ≃ 7.3. This burst occurred when the Universe was only about 5% of its current age. We discuss the signature of these rare events within the context of the SVOM operating model and the ways to optimise their identification with adapted ground follow-up observation strategies.

AB - Most long gamma-ray bursts (LGRBs) originate from a rare type of massive stellar explosion. Their afterglows, while rapidly fading, can initially be extremely luminous at optical and near-infrared wavelengths, making them detectable at large cosmological distances. Here we report the detection and observations of GRB 250314A by the SVOM satellite and the subsequent follow-up campaign that led to the discovery of the near-infrared afterglow and spectroscopic measurements of its redshift z ≃ 7.3. This burst occurred when the Universe was only about 5% of its current age. We discuss the signature of these rare events within the context of the SVOM operating model and the ways to optimise their identification with adapted ground follow-up observation strategies.

UR - https://www.scopus.com/pages/publications/105025556504

UR - https://www.scopus.com/pages/publications/105025556504#tab=citedBy

U2 - 10.1051/0004-6361/202556580

DO - 10.1051/0004-6361/202556580

M3 - Article

AN - SCOPUS:105025556504

SN - 0004-6361

VL - 704

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - L7

ER -

SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization

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