Year: 2025
Type: preprint
Abstract: Most long Gamma-ray bursts originate from a rare type of massive stellar explosion. Their afterglows, while rapidly fading, can be initially extremely luminous at optical/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 with the near-infrared afterglow discovery and the spectroscopic measurements of its redshift z $\simeq$ 7.3 . This burst happened when the Universe was only $\sim$ 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 optimize their identification with adapted ground follow-up observation strategies.
Source: arXiv (Cornell University)
Authors: Cordier, B., Wei, J. Y., Tanvir, N. R., Vergani, S. D., Malesani, D. B., Fynbo, J. P. U., Postigo, A. de Ugarte, 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., Schneider, B., Levan, A. J., Thakur, A. L., Zhu, Z. P., Corcoran, G., Rakotondrainibe, N. A., D'Elia, V., Turpin, D., Fernandez, J. F. Agui, 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. E., Eyles-Ferris, R. A. J., Fausey, H., 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., Zheng, S. J.
Institutions: Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay - Etablissement de Saclay, Direction de la Recherche Fondamentale, CEA Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Institut d'Astrophysique de Paris, Laboratoire d'Étude de l'Univers et des Phénomènes Extrêmes, Laboratoire d’Astrophysique de Marseille, Astrophysique, Instrumentation et Modélisation, Institut de Recherche en Astrophysique et Planétologie, Laboratoire Univers et Particules de Montpellier, European Space Agency, Université Paris Diderot, Centre National d'Études Spatiales, Centre de physique des particules de Marseille, Observatoire astronomique de Strasbourg, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4415282124