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

Title:	SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization
Authors:	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, W-M; Zhang, Y-H; Zhang, XF; Zheng, S
Publisher Information:	EDP Sciences
Publication Year:	2025
Collection:	Liverpool John Moores University: LJMU Research Online
Subject Terms:	QB Astronomy; QC Physics
Description:	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.
Document Type:	article in journal/newspaper
File Description:	text
Language:	English
ISSN:	0004-6361
Relation:	https://researchonline.ljmu.ac.uk/id/eprint/27934/1/SVOM%20GRB%20250314A%20at%20z%207.3-An%20exploding%20star%20in%20the%20era%20of%20re-ionization.pdf; Cordier, B, Wei, JY, Tanvir, NR ORCID logoorcid:0000-0003-3274-6336 , Vergani, SD ORCID logoorcid:0000-0001-9398-4907 , Malesani, DB, Fynbo, JPU ORCID logoorcid:0000-0002-8149-8298 , de Ugarte Postigo, A ORCID logoorcid:0000-0001-7717-5085 , Saccardi, A ORCID logoorcid:0000-0002-6950-4587 , Daigne, F, Atteia, JL ORCID logoorcid:0000-0001-7346-5114 , Godet, O ORCID logoorcid:0000-0001-7635-9544 , Götz, D ORCID logoorcid:0000-0001-9494-0981 , Qiu, YL, Schanne, S ORCID logoorcid:0009-0007-1271-9900 , Xin, LP ORCID logoorcid:0000-0002-9422-3437 , Zhang, B ORCID logoorcid:0000-0002-9725-2524 , Zhang, SN ORCID logoorcid:0000-0001-5586-1017 , Nayana, AJ, Piro, L, Fausey, H ORCID logoorcid:0000-0002-2927-2398 , Schneider, B, Levan, AJ, Thakur, AL ORCID logoorcid:0000-0001-9354-2308 , Zhu, ZP, Corcoran, G ORCID logoorcid:0009-0009-1573-8300 , Rakotondrainibe, NA ORCID logoorcid:0009-0004-0263-7766 , D’Elia, V, Turpin, D ORCID logoorcid:0000-0003-1835-1522 , Agüí Fernández, JF ORCID logoorcid:0000-0001-6991-7616 , Aloy, MA ORCID logoorcid:0000-0002-5552-7681 , An, J ORCID logoorcid:0009-0000-5068-3434 , Bai, M, Basa, S ORCID logoorcid:0000-0002-4291-333X , Bernardini, MG ORCID logoorcid:0000-0001-6106-3046 , Bochenek, A ORCID logoorcid:0009-0008-2714-2507 , Brivio, R ORCID logoorcid:0009-0000-0564-7733 , Brunet, M ORCID logoorcid:0009-0002-6036-9873 , Bruni, G ORCID logoorcid:0000-0002-5182-6289 , Cenko, SB ORCID logoorcid:0000-0003-1673-970X , Cheng, Q ORCID logoorcid:0000-0003-4200-9954 , Chrimes, A ORCID logoorcid:0000-0001-9842-6808 , Christensen, L ORCID logoorcid:0000-0001-8415-7547 , Claret, A ORCID logoorcid:0000-0003-2901-8223 , Coleiro, A ORCID logoorcid:0000-0003-0860-440X , Cotter, L ORCID logoorcid:0000-0002-7910-6646 , Crepaldi, S, Deng, JS, Dimple ORCID logoorcid:0000-0001-9868-9042 , Dong, YW, Dornic, D, Evans, PA ORCID logoorcid:0000-0002-8465-3353 , Eyles-Ferris, RAJ ORCID logoorcid:0000-0002-8775-2365 , Ferro, M, Galbany, L ORCID logoorcid:0000-0002-1296-6887 , Garnichey, M ORCID logoorcid:0009-0003-5018-643X , Gianfagna, G ORCID logoorcid:0000-0001-8427-273X , Gompertz, BP ORCID logoorcid:0000-0002-5826-0548 , Goto, H, Habeeb, N ORCID logoorcid:0000-0003-0944-7194 , Han, PY, Han, XH ORCID logoorcid:0000-0002-6107-0147 , Hartmann, DH ORCID logoorcid:0000-0002-8028-0991 , Heintz, KE ORCID logoorcid:0000-0002-9389-7413 , Hu, JY, Huang, MH, Izzo, L ORCID logoorcid:0000-0001-9695-8472 , Jakobsson, P ORCID logoorcid:0000-0002-9404-5650 , Kennea, JA ORCID logoorcid:0000-0002-6745-4790 , Lachaud, C ORCID logoorcid:0000-0002-3732-854X , Laskar, T ORCID logoorcid:0000-0003-1792-2338 , Li, D, Li, HL, Li, RZ ORCID logoorcid:0000-0002-4205-0933 , Liu, X, Liu, Y ORCID logoorcid:0009-0001-6078-5239 , Lombardi, G ORCID logoorcid:0000-0003-3412-0556 , Louvin, H, Maggi, P ORCID logoorcid:0000-0001-5612-5185 , Maiolino, T, Mao, QY, Martin-Carrillo, A ORCID logoorcid:0000-0001-5108-0627 , Mercier, K, O’Brien, P ORCID logoorcid:0000-0002-5128-1899 , Palmerio, JT ORCID logoorcid:0000-0002-9408-1563 , Petitjean, P, Pieterse, DLA ORCID logoorcid:0000-0003-3114-2733 , Piron, F ORCID logoorcid:0000-0001-6885-7156 , Pugliese, G ORCID logoorcid:0000-0003-3457-9375 , Rayson, BC, Reynolds, T ORCID logoorcid:0000-0002-1022-6463 , Robinet, F, Rossi, A ORCID logoorcid:0000-0002-8860-6538 , Salvaterra, R ORCID logoorcid:0000-0002-9393-8078 , Thöne, CC ORCID logoorcid:0000-0002-7978-7648 , Topçu, B, Wang, CW ORCID logoorcid:0009-0008-8053-2985 , Wang, J, Wang, Y, Wu, C, Xiong, SL ORCID logoorcid:0000-0002-4771-7653 , Xu, D, Yang, HN, Yuan, W-M, Zhang, Y-H, Zhang, XF and Zheng, S (2025) SVOM GRB 250314A at z ≃ 7.3: An exploding star in the era of re-ionization. Astronomy & Astrophysics, 704. ISSN 0004-6361
DOI:	10.1051/0004-6361/202556580
Availability:	https://researchonline.ljmu.ac.uk/id/eprint/27934/; https://doi.org/10.1051/0004-6361/202556580
Rights:	cc_by
Accession Number:	edsbas.BA094793
Database:	BASE