2025A&A...704L...7C

Query : 2025A&A...704L...7C

2025A&A...704L...7C - Astronomy and Astrophysics, volume 704L7 (2025/12-1)

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

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., GOTZ D., QIU Y.L., SCHANNE S., XIN L.P., ZHANG B., ZHANG S.N., NAYANA A.J., PIRO L., FAUSEY H., SCHNEIDER B., LEVAN A.J., THAKUR A.L., ZHU Z.P., CORCORAN G., RAKOTONDRAINIBE N.A., D'ELIA V., TURPIN D., AGUI FERNANDEZ J.F., ALOY M.A., AN J., BAI M., BASA S., BERNARDINI M.G., BOCHENEK A., BRIVIO R., BRUNET M., BRUNI G., CENKO S.B., CHENG Q., CHRIMES A., CHRISTENSEN L., CLARET A., COLEIRO A., COTTER L., CREPALDI S., DENG J.S., DIMPLE, DONG Y.W., DORNIC D., EVANS P.A., EYLES-FERRIS R.A.J., FERRO M., GALBANY L., GARNICHEY M., GIANFAGNA G., GOMPERTZ B.P., GOTO H., HABEEB N., HAN P.Y., HAN X.H., HARTMANN D.H., HEINTZ K.E., HU J.Y., HUANG M.H., IZZO L., JAKOBSSON P., KENNEA J.A., LACHAUD C., LASKAR T., LI D., LI H.L., LI R.Z., LIU X., LIU Y., LOMBARDI G., LOUVIN H., MAGGI P., MAIOLINO T., MAO Q.Y., MARTIN-CARRILLO A., MERCIER K., O'BRIEN P., PALMERIO J.T., PETITJEAN P., PIETERSE D.L.A., PIRON F., PUGLIESE G., RAYSON B.C., REYNOLDS T., ROBINET F., ROSSI A., SALVATERRA R., THONE C.C., TOPCU B., WANG C.W., WANG J., WANG Y., WU C., XIONG S.L., XU D., YANG H.N., YUAN W.M., ZHANG Y.H., ZHANG X.F. and ZHENG S.J.

Abstract (from CDS):

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.

Abstract Copyright: © The Authors 2025

Journal keyword(s): gamma-ray burst: general - galaxies: high-redshift - gamma-ray burst: individual: GRB250314A

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 050904 gB 00 54 50.794 +14 05 09.42           ~ 496 0
2 GRB 100905A gB 02 06 12.06 +14 55 45.9           ~ 45 0
3 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 213 0
4 GRB 250506A gB 07 48 57.29 +63 48 44.7           ~ 1 0
5 Fermi bn090423330 gB 09 55 33.19 +18 08 57.7           ~ 392 0
6 GRB 240218A gB 10 47 11.24 +01 16 34.8           ~ 27 0
7 GRB 250127A gB 11 18 21 +03 20.8           ~ 1 0
8 GRB 140515A gB 12 24 15.48 +15 06 17.7           ~ 90 0
9 GRB 250314A gB 13 25 05.280 -05 17 36.30           ~ 5 0
10 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
11 GRB 090429B gB 14 02 40.10 +32 10 14.6           ~ 166 0
12 GRB 120521C gB 14 17 09.10 +42 08 39.8           ~ 93 0
13 GRB 130606A gB 16 37 35.12 +29 47 46.4           ~ 185 0
14 GRB 120923A gB 20 15 10.73 +06 13 16.9           ~ 59 0
15 GRB 210905A gB 20 36 11.64 -44 26 24.3           ~ 42 0

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