Soft X-ray prompt emission from a high-redshift gamma-ray burst EP240315a
Creators: name: Liu, Y.
name: Sun, H.
name: Xu, D.
name: Svinkin, D. S.
name: Delaunay, J.
name: Tanvir, N. R.
name: Gao, H.
name: Zhang, C.
name: Chen, Y.
name: Wu, X.-F.
name: Zhang, B.
name: Yuan, W.
name: An, J.
name: Bruni, G.
name: Frederiks, D. D.
name: Ghirlanda, G.
name: Hu, J.-W.
name: Li, A.
name: Li, C.-K.
name: Li, J.-D.
name: Malesani, D. B.
name: Piro, L.
name: Raman, G.
name: Ricci, R.
name: Troja, E.
name: Vergani, S. D.
name: Wu, Q.-Y.
name: Yang, J.
name: Zhang, B.-B.
name: Zhu, Z.-P.
name: Postigo, A. De Ugarte
name: Demin, A. G.
name: Dobie, D.
name: Fan, Z.
name: Fu, S.-Y.
name: Fynbo, J. P. U.
name: Geng, J.-J.
name: Gianfagna, G.
name: Hu, Y.-D.
name: Huang, Y.-F.
name: Jiang, S.-Q.
name: Jonker, P. G.
name: Julakanti, Y.
name: Kennea, J. A.
name: Kokomov, A. A.
name: Kuulkers, E.
name: Lei, W.-H.
name: Leung, J. K.
name: Levan, A. J.
name: Li, D.-Y.
name: Li, Y.
name: Littlefair, S. P.
name: Liu, X.
name: Lysenko, A. L.
name: Ma, Y.-N.
name: Martin-Carrillo, A.
name: O'Brien, P.
name: Parsotan, Tyler
name: Quirola-Vasquez, J.
name: Ridnaia, A. V.
name: Ronchini, S.
name: Rossi, A.
name: Mata-Sanchez, D.
name: Schneider, B.
name: Shen, R.-F.
name: Thakur, A. L.
name: Tohuvavohu, A.
name: Torres, M. A. P.
name: Tsvetkova, A. E.
name: Ulanov, M. V.
name: Wei, J.-J.
name: Xiao, D.
name: Yin, Y.-H. I.
name: Bai, M.
name: Burwitz, V.
name: Cai, Z.-M.
name: Chen, F.-S.
name: Chen, H.-L.
name: Chen, T.-X.
name: Chen, W.
name: Chen, Y.-F.
name: Chen, Y.-H.
name: Cheng, H.-Q.
name: Cui, C.-Z.
name: Cui, W.-W.
name: Dai, Y.-F.
name: Dai, Z.-G.
name: Eder, J.
name: Fan, D.-W.
name: Feldman, C.
name: Feng, H.
name: Feng, Z.
name: Friedrich, P.
name: Gao, X.
name: Guan, J.
name: Han, D.-W.
name: Han, J.
name: Hou, D.-J.
name: Hu, H.-B.
name: Hu, T.
name: Huang, M.-H.
name: Huo, J.
name: Hutchinson, I.
name: Ji, Z.
name: Jia, S.-M.
name: Jia, Z.-Q.
name: Jiang, B.-W.
name: Jin, C.-C.
name: Jin, G.
name: Jin, J.-J.
name: Keereman, A.
name: Lerman, H.
name: Li, J.-F.
name: Li, L.-H.
name: Li, M.-S.
name: Li, W.
name: Li, Z.-D.
name: Lian, T.-Y.
name: Liang, E.-W.
name: Ling, Z.-X.
name: Liu, C.-Z.
name: Liu, H.-Y.
name: Liu, H.-Q.
name: Liu, M.-J.
name: Liu, Y.-R.
name: Lu, F.-J.
name: LU, H.-J.
name: Luo, L.-D.
name: Ma, F. L.
name: Ma, J.
name: Mao, J.-R.
name: Mao, X.
name: McHugh, M.
name: Meidinger, N.
name: Nandra, K.
name: Osborne, J. P.
name: Pan, H.-W.
name: Pan, X.
name: Ravasio, M. E.
name: Rau, A.
name: Rea, N.
name: Rehman, U.
name: Sanders, J.
name: Santovincenzo, A.
name: Song, L.-M.
name: Su, J.
name: Sun, L.-J.
name: Sun, S.-L.
name: Sun, X.-J.
name: Tan, Y.-Y.
name: Tang, Q.-J.
name: Tao, Y.-H.
name: Tong, J.-Z.
name: Wang, H.
name: Wang, J.
name: Wang, L.
name: Wang, W.-X.
name: Wang, X.-F.
name: Wang, X.-Y.
name: Wang, Y.-L.
name: Wang, Y.-S.
name: Wei, D.-M.
name: Willingale, R.
name: Xiong, S.-L.
name: Xu, H.-T.
name: Xu, J.-J.
name: Xu, X.-P.
name: Xu, Y.-F.
name: Xu, Z.
name: Xue, C.-B.
name: Xue, Y.-L.
name: Yan, A.-L.
name: Yang, F.
name: Yang, H.-N.
name: Yang, X.-T.
name: Yang, Y.-J.
name: Yu, Y.-W.
name: Zhang, J.
name: Zhang, M.
name: Zhang, S.-N.
name: Zhang, W.-D.
name: Zhang, W.-J.
name: Zhang, Y.-H.
name: Zhang, Z.
name: Zhang, Z.
name: Zhang, Z.-L.
name: Zhao, D.-H.
name: Zhao, H.-S.
name: Zhao, X.-F.
name: Zhao, Z.-J.
name: Zhou, L.-X.
name: Zhou, Y.-L.
name: Zhu, Y.-X.
name: Zhu, Z.-C.
name: Zuo, X.-X.
Publisher: name: Maryland Shared Open Access Repository
Year: 2024
Subjects: Astrophysics - High Energy Astrophysical Phenomena

description: Long gamma-ray bursts (GRBs) are believed to originate from core collapse of massive stars. High-redshift GRBs can probe the star formation and reionization history of the early universe, but their detection remains rare. Here we report the detection of a GRB triggered in the 0.5--4 keV band by the Wide-field X-ray Telescope (WXT) on board the Einstein Probe (EP) mission, designated as EP240315a, whose bright peak was also detected by the Swift Burst Alert Telescope and Konus-Wind through off-line analyses. At a redshift of $z=4.859$, EP240315a showed a much longer and more complicated light curve in the soft X-ray band than in gamma-rays. Benefiting from a large field-of-view ($\sim$3600 deg$^2$) and a high sensitivity, EP-WXT captured the earlier engine activation and extended late engine activity through a continuous detection. With a peak X-ray flux at the faint end of previously known high-$z$ GRBs, the detection of EP240315a demonstrates the great potential for EP to study the early universe via GRBs.