Year: 2025
Type: article
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.
Authors: 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
Institutions: University of Nevada, Las Vegas, University of Copenhagen, Centre National de la Recherche Scientifique, Aix-Marseille Université, Université Paris Cité, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Astrophysique, Instrumentation et Modélisation, Institut de Recherche en Astrophysique et Planétologie, Université de Toulouse, University of Hong Kong, Chinese Academy of Sciences, Institute of High Energy Physics, University of California, Berkeley, Institute for Space Astrophysics and Planetology, National Institute for Astrophysics, Baylor University, Radboud University Nijmegen, University of Warwick, University College Dublin, Calar Alto Observatory, Universitat de València, National Space Science Center, Brera Astronomical Observatory, Laboratoire Univers et Particules de Montpellier, Institut National de Physique Nucléaire et de Physique des Particules, Liverpool John Moores University, Goddard Space Flight Center, European Space Agency, European Space Research and Technology Centre, Centre National d'Études Spatiales, Centre de physique des particules de Marseille, Institute of Space Sciences, Institut d'Estudis Espacials de Catalunya, University of Birmingham, Kanazawa University, University of Utah, Astronomical Observatory of Capodimonte, Huazhong University of Science and Technology, Clemson University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7115897273
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