Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a

Y. Liu; H. Sun; D. Xu; D. S. Svinkin; J. Delaunay; N. R. Tanvir; H. Gao; C. Zhang; Y. Chen; X. F. Wu; B. Zhang; W. Yuan; J. An; G. Bruni; D. D. Frederiks; G. Ghirlanda; J. W. Hu; A. Li; C. K. Li; J. D. Li; D. B. Malesani; L. Piro; G. Raman; R. Ricci; E. Troja; S. D. Vergani; Q. Y. Wu; J. Yang; B. B. Zhang; Z. P. Zhu; A. de Ugarte Postigo; A. G. Demin; D. Dobie; Z. Fan; S. Y. Fu; J. P.U. Fynbo; J. J. Geng; G. Gianfagna; Y. D. Hu; Y. F. Huang; S. Q. Jiang; P. G. Jonker; Y. Julakanti; J. A. Kennea; A. A. Kokomov; E. Kuulkers; W. H. Lei; J. K. Leung; A. J. Levan; D. Y. Li; Y. Li; S. P. Littlefair; X. Liu; A. L. Lysenko; Y. N. Ma; A. Martin-Carrillo; P. O’Brien; T. Parsotan; J. Quirola-Vásquez; A. V. Ridnaia; S. Ronchini; A. Rossi; D. Mata-Sánchez; B. Schneider; R. F. Shen; A. L. Thakur; A. Tohuvavohu; M. A.P. Torres; A. E. Tsvetkova; M. V. Ulanov; J. J. Wei; D. Xiao; Y. H.I. Yin; M. Bai; V. Burwitz; Z. M. Cai; F. S. Chen; H. L. Chen; T. X. Chen; W. Chen; Y. F. Chen; Y. H. Chen; H. Q. Cheng; B. Cordier; C. Z. Cui; W. W. Cui; Y. F. Dai; Z. G. Dai; J. Eder; R. A.J. Eyles-Ferris; D. W. Fan; C. Feldman; H. Feng; Z. Feng; P. Friedrich; X. Gao; J. F. Gonzalez; J. Guan; D. W. Han; J. Han; D. J. Hou; H. B. Hu; T. Hu; M. H. Huang; J. Huo; I. Hutchinson; Z. Ji; S. M. Jia; Z. Q. Jia; B. W. Jiang; C. C. Jin; G. Jin; J. J. Jin; A. Keereman; H. Lerman; J. F. Li; L. H. Li; M. S. Li; W. Li; Z. D. Li; T. Y. Lian; E. W. Liang; Z. X. Ling; C. Z. Liu; H. Y. Liu; H. Q. Liu; M. J. Liu; Y. R. Liu; F. J. Lu; H. J. Lü; L. D. Luo; F. L. Ma; J. Ma; J. R. Mao; X. Mao; M. McHugh; N. Meidinger; K. Nandra; J. P. Osborne; H. W. Pan; X. Pan; M. E. Ravasio; A. Rau; N. Rea; U. Rehman; J. Sanders; A. Santovincenzo; L. M. Song; J. Su; L. J. Sun; S. L. Sun; X. J. Sun; Y. Y. Tan; Q. J. Tang; Y. H. Tao; J. Z. Tong; C. Y. Wang; H. Wang; J. Wang; L. Wang; W. X. Wang; X. F. Wang; X. Y. Wang; Y. L. Wang; Y. S. Wang; D. M. Wei; R. Willingale; S. L. Xiong; H. T. Xu; J. J. Xu; X. P. Xu; Y. F. Xu; Z. Xu; C. B. Xue; Y. L. Xue; A. L. Yan; F. Yang; H. N. Yang; X. T. Yang; Y. J. Yang; Y. W. Yu; J. Zhang; M. Zhang; S. N. Zhang; W. D. Zhang; W. J. Zhang; Y. H. Zhang; Z. Zhang; Z. L. Zhang; D. H. Zhao; H. S. Zhao; X. F. Zhao; Z. J. Zhao; L. X. Zhou; Y. L. Zhou; Y. X. Zhu; Z. C. Zhu; X. X. Zuo

doi:10.1038/s41550-024-02449-8

Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a

Y. Liu, H. Sun, D. Xu, D. S. Svinkin, J. Delaunay, N. R. Tanvir, H. Gao, C. Zhang, Y. Chen, X. F. Wu, B. Zhang, W. Yuan, J. An, G. Bruni, D. D. Frederiks, G. Ghirlanda, J. W. Hu, A. Li, C. K. Li, J. D. LiD. B. Malesani, L. Piro, G. Raman, R. Ricci, E. Troja, S. D. Vergani, Q. Y. Wu, J. Yang, B. B. Zhang, Z. P. Zhu, A. de Ugarte Postigo, A. G. Demin, D. Dobie, Z. Fan, S. Y. Fu, J. P.U. Fynbo, J. J. Geng, G. Gianfagna, Y. D. Hu, Y. F. Huang, S. Q. Jiang, P. G. Jonker, Y. Julakanti, J. A. Kennea, A. A. Kokomov, E. Kuulkers, W. H. Lei, J. K. Leung, A. J. Levan, D. Y. Li, Y. Li, S. P. Littlefair, X. Liu, A. L. Lysenko, Y. N. Ma, A. Martin-Carrillo, P. O’Brien, T. Parsotan, J. Quirola-Vásquez, A. V. Ridnaia, S. Ronchini, A. Rossi, D. Mata-Sánchez, B. Schneider, R. F. Shen, A. L. Thakur, A. Tohuvavohu, M. A.P. Torres, A. E. Tsvetkova, M. V. Ulanov, J. J. Wei, D. Xiao, Y. H.I. Yin, M. Bai, V. Burwitz, Z. M. Cai, F. S. Chen, H. L. Chen, T. X. Chen, W. Chen, Y. F. Chen, Y. H. Chen, H. Q. Cheng, B. Cordier, C. Z. Cui, W. W. Cui, Y. F. Dai, Z. G. Dai, J. Eder, R. A.J. Eyles-Ferris, D. W. Fan, C. Feldman, H. Feng, Z. Feng, P. Friedrich, X. Gao, J. F. Gonzalez, J. Guan, D. W. Han, J. Han, D. J. Hou, H. B. Hu, T. Hu, M. H. Huang, J. Huo, I. Hutchinson, Z. Ji, S. M. Jia, Z. Q. Jia, B. W. Jiang, C. C. Jin, G. Jin, J. J. Jin, A. Keereman, H. Lerman, J. F. Li, L. H. Li, M. S. Li, W. Li, Z. D. Li, T. Y. Lian, E. W. Liang, Z. X. Ling, C. Z. Liu, H. Y. Liu, H. Q. Liu, M. J. Liu, Y. R. Liu, F. J. Lu, H. J. Lü, L. D. Luo, F. L. Ma, J. Ma, J. R. Mao, X. Mao, M. McHugh, N. Meidinger, K. Nandra, J. P. Osborne, H. W. Pan, X. Pan, M. E. Ravasio, A. Rau, N. Rea, U. Rehman, J. Sanders, A. Santovincenzo, L. M. Song, J. Su, L. J. Sun, S. L. Sun, X. J. Sun, Y. Y. Tan, Q. J. Tang, Y. H. Tao, J. Z. Tong, C. Y. Wang, H. Wang, J. Wang, L. Wang, W. X. Wang, X. F. Wang, X. Y. Wang, Y. L. Wang, Y. S. Wang, D. M. Wei, R. Willingale, S. L. Xiong, H. T. Xu, J. J. Xu, X. P. Xu, Y. F. Xu, Z. Xu, C. B. Xue, Y. L. Xue, A. L. Yan, F. Yang, H. N. Yang, X. T. Yang, Y. J. Yang, Y. W. Yu, J. Zhang, M. Zhang, S. N. Zhang, W. D. Zhang, W. J. Zhang, Y. H. Zhang, Z. Zhang, Z. L. Zhang, D. H. Zhao, H. S. Zhao, X. F. Zhao, Z. J. Zhao, L. X. Zhou, Y. L. Zhou, Y. X. Zhu, Z. C. Zhu, X. X. Zuo

Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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 (~3,600°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.

Original language	English (US)
Journal	Nature Astronomy
DOIs	https://doi.org/10.1038/s41550-024-02449-8
State	Accepted/In press - 2025

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics

Access to Document

10.1038/s41550-024-02449-8

Cite this

Liu, Y., Sun, H., Xu, D., Svinkin, D. S., Delaunay, J., Tanvir, N. R., Gao, H., Zhang, C., Chen, Y., Wu, X. F., Zhang, B., Yuan, W., An, J., Bruni, G., Frederiks, D. D., Ghirlanda, G., Hu, J. W., Li, A., Li, C. K., ... Zuo, X. X. (Accepted/In press). Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a. Nature Astronomy. https://doi.org/10.1038/s41550-024-02449-8

@article{f8543206fbc948b18fb2587268a7ab53,

title = "Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a",

abstract = "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 (~3,600°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.",

author = "Y. Liu and H. Sun and D. Xu and Svinkin, {D. S.} and J. Delaunay and Tanvir, {N. R.} and H. Gao and C. Zhang and Y. Chen and Wu, {X. F.} and B. Zhang and W. Yuan and J. An and G. Bruni and Frederiks, {D. D.} and G. Ghirlanda and Hu, {J. W.} and A. Li and Li, {C. K.} and Li, {J. D.} and Malesani, {D. B.} and L. Piro and G. Raman and R. Ricci and E. Troja and Vergani, {S. D.} and Wu, {Q. Y.} and J. Yang and Zhang, {B. B.} and Zhu, {Z. P.} and {de Ugarte Postigo}, A. and Demin, {A. G.} and D. Dobie and Z. Fan and Fu, {S. Y.} and Fynbo, {J. P.U.} and Geng, {J. J.} and G. Gianfagna and Hu, {Y. D.} and Huang, {Y. F.} and Jiang, {S. Q.} and Jonker, {P. G.} and Y. Julakanti and Kennea, {J. A.} and Kokomov, {A. A.} and E. Kuulkers and Lei, {W. H.} and Leung, {J. K.} and Levan, {A. J.} and Li, {D. Y.} and Y. Li and Littlefair, {S. P.} and X. Liu and Lysenko, {A. L.} and Ma, {Y. N.} and A. Martin-Carrillo and P. O{\textquoteright}Brien and T. Parsotan and J. Quirola-V{\'a}squez and Ridnaia, {A. V.} and S. Ronchini and A. Rossi and D. Mata-S{\'a}nchez and B. Schneider and Shen, {R. F.} and Thakur, {A. L.} and A. Tohuvavohu and Torres, {M. A.P.} and Tsvetkova, {A. E.} and Ulanov, {M. V.} and Wei, {J. J.} and D. Xiao and Yin, {Y. H.I.} and M. Bai and V. Burwitz and Cai, {Z. M.} and Chen, {F. S.} and Chen, {H. L.} and Chen, {T. X.} and W. Chen and Chen, {Y. F.} and Chen, {Y. H.} and Cheng, {H. Q.} and B. Cordier and Cui, {C. Z.} and Cui, {W. W.} and Dai, {Y. F.} and Dai, {Z. G.} and J. Eder and Eyles-Ferris, {R. A.J.} and Fan, {D. W.} and C. Feldman and H. Feng and Z. Feng and P. Friedrich and X. Gao and Gonzalez, {J. F.} and J. Guan and Han, {D. W.} and J. Han and Hou, {D. J.} and Hu, {H. B.} and T. Hu and Huang, {M. H.} and J. Huo and I. Hutchinson and Z. Ji and Jia, {S. M.} and Jia, {Z. Q.} and Jiang, {B. W.} and Jin, {C. C.} and G. Jin and Jin, {J. J.} and A. Keereman and H. Lerman and Li, {J. F.} and Li, {L. H.} and Li, {M. S.} and W. Li and Li, {Z. D.} and Lian, {T. Y.} and Liang, {E. W.} and Ling, {Z. X.} and Liu, {C. Z.} and Liu, {H. Y.} and Liu, {H. Q.} and Liu, {M. J.} and Liu, {Y. R.} and Lu, {F. J.} and L{\"u}, {H. J.} and Luo, {L. D.} and Ma, {F. L.} and J. Ma and Mao, {J. R.} and X. Mao and M. McHugh and N. Meidinger and K. Nandra and Osborne, {J. P.} and Pan, {H. W.} and X. Pan and Ravasio, {M. E.} and A. Rau and N. Rea and U. Rehman and J. Sanders and A. Santovincenzo and Song, {L. M.} and J. Su and Sun, {L. J.} and Sun, {S. L.} and Sun, {X. J.} and Tan, {Y. Y.} and Tang, {Q. J.} and Tao, {Y. H.} and Tong, {J. Z.} and Wang, {C. Y.} and H. Wang and J. Wang and L. Wang and Wang, {W. X.} and Wang, {X. F.} and Wang, {X. Y.} and Wang, {Y. L.} and Wang, {Y. S.} and Wei, {D. M.} and R. Willingale and Xiong, {S. L.} and Xu, {H. T.} and Xu, {J. J.} and Xu, {X. P.} and Xu, {Y. F.} and Z. Xu and Xue, {C. B.} and Xue, {Y. L.} and Yan, {A. L.} and F. Yang and Yang, {H. N.} and Yang, {X. T.} and Yang, {Y. J.} and Yu, {Y. W.} and J. Zhang and M. Zhang and Zhang, {S. N.} and Zhang, {W. D.} and Zhang, {W. J.} and Zhang, {Y. H.} and Z. Zhang and Zhang, {Z. L.} and Zhao, {D. H.} and Zhao, {H. S.} and Zhao, {X. F.} and Zhao, {Z. J.} and Zhou, {L. X.} and Zhou, {Y. L.} and Zhu, {Y. X.} and Zhu, {Z. C.} and Zuo, {X. X.}",

note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive licence to Springer Nature Limited 2025.",

year = "2025",

doi = "10.1038/s41550-024-02449-8",

language = "English (US)",

journal = "Nature Astronomy",

issn = "2397-3366",

publisher = "Nature Publishing Group",

}

Liu, Y, Sun, H, Xu, D, Svinkin, DS, Delaunay, J, Tanvir, NR, Gao, H, Zhang, C, Chen, Y, Wu, XF, Zhang, B, Yuan, W, An, J, Bruni, G, Frederiks, DD, Ghirlanda, G, Hu, JW, Li, A, Li, CK, Li, JD, Malesani, DB, Piro, L, Raman, G, Ricci, R, Troja, E, Vergani, SD, Wu, QY, Yang, J, Zhang, BB, Zhu, ZP, de Ugarte Postigo, A, Demin, AG, Dobie, D, Fan, Z, Fu, SY, Fynbo, JPU, Geng, JJ, Gianfagna, G, Hu, YD, Huang, YF, Jiang, SQ, Jonker, PG, Julakanti, Y, Kennea, JA, Kokomov, AA, Kuulkers, E, Lei, WH, Leung, JK, Levan, AJ, Li, DY, Li, Y, Littlefair, SP, Liu, X, Lysenko, AL, Ma, YN, Martin-Carrillo, A, O’Brien, P, Parsotan, T, Quirola-Vásquez, J, Ridnaia, AV, Ronchini, S, Rossi, A, Mata-Sánchez, D, Schneider, B, Shen, RF, Thakur, AL, Tohuvavohu, A, Torres, MAP, Tsvetkova, AE, Ulanov, MV, Wei, JJ, Xiao, D, Yin, YHI, Bai, M, Burwitz, V, Cai, ZM, Chen, FS, Chen, HL, Chen, TX, Chen, W, Chen, YF, Chen, YH, Cheng, HQ, Cordier, B, Cui, CZ, Cui, WW, Dai, YF, Dai, ZG, Eder, J, Eyles-Ferris, RAJ, Fan, DW, Feldman, C, Feng, H, Feng, Z, Friedrich, P, Gao, X, Gonzalez, JF, Guan, J, Han, DW, Han, J, Hou, DJ, Hu, HB, Hu, T, Huang, MH, Huo, J, Hutchinson, I, Ji, Z, Jia, SM, Jia, ZQ, Jiang, BW, Jin, CC, Jin, G, Jin, JJ, Keereman, A, Lerman, H, Li, JF, Li, LH, Li, MS, Li, W, Li, ZD, Lian, TY, Liang, EW, Ling, ZX, Liu, CZ, Liu, HY, Liu, HQ, Liu, MJ, Liu, YR, Lu, FJ, Lü, HJ, Luo, LD, Ma, FL, Ma, J, Mao, JR, Mao, X, McHugh, M, Meidinger, N, Nandra, K, Osborne, JP, Pan, HW, Pan, X, Ravasio, ME, Rau, A, Rea, N, Rehman, U, Sanders, J, Santovincenzo, A, Song, LM, Su, J, Sun, LJ, Sun, SL, Sun, XJ, Tan, YY, Tang, QJ, Tao, YH, Tong, JZ, Wang, CY, Wang, H, Wang, J, Wang, L, Wang, WX, Wang, XF, Wang, XY, Wang, YL, Wang, YS, Wei, DM, Willingale, R, Xiong, SL, Xu, HT, Xu, JJ, Xu, XP, Xu, YF, Xu, Z, Xue, CB, Xue, YL, Yan, AL, Yang, F, Yang, HN, Yang, XT, Yang, YJ, Yu, YW, Zhang, J, Zhang, M, Zhang, SN, Zhang, WD, Zhang, WJ, Zhang, YH, Zhang, Z, Zhang, ZL, Zhao, DH, Zhao, HS, Zhao, XF, Zhao, ZJ, Zhou, LX, Zhou, YL, Zhu, YX, Zhu, ZC & Zuo, XX 2025, 'Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a', Nature Astronomy. https://doi.org/10.1038/s41550-024-02449-8

TY - JOUR

T1 - Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a

AU - Liu, Y.

AU - Sun, H.

AU - Xu, D.

AU - Svinkin, D. S.

AU - Delaunay, J.

AU - Tanvir, N. R.

AU - Gao, H.

AU - Zhang, C.

AU - Chen, Y.

AU - Wu, X. F.

AU - Zhang, B.

AU - Yuan, W.

AU - An, J.

AU - Bruni, G.

AU - Frederiks, D. D.

AU - Ghirlanda, G.

AU - Hu, J. W.

AU - Li, A.

AU - Li, C. K.

AU - Li, J. D.

AU - Malesani, D. B.

AU - Piro, L.

AU - Raman, G.

AU - Ricci, R.

AU - Troja, E.

AU - Vergani, S. D.

AU - Wu, Q. Y.

AU - Yang, J.

AU - Zhang, B. B.

AU - Zhu, Z. P.

AU - de Ugarte Postigo, A.

AU - Demin, A. G.

AU - Dobie, D.

AU - Fan, Z.

AU - Fu, S. Y.

AU - Fynbo, J. P.U.

AU - Geng, J. J.

AU - Gianfagna, G.

AU - Hu, Y. D.

AU - Huang, Y. F.

AU - Jiang, S. Q.

AU - Jonker, P. G.

AU - Julakanti, Y.

AU - Kennea, J. A.

AU - Kokomov, A. A.

AU - Kuulkers, E.

AU - Lei, W. H.

AU - Leung, J. K.

AU - Levan, A. J.

AU - Li, D. Y.

AU - Li, Y.

AU - Littlefair, S. P.

AU - Liu, X.

AU - Lysenko, A. L.

AU - Ma, Y. N.

AU - Martin-Carrillo, A.

AU - O’Brien, P.

AU - Parsotan, T.

AU - Quirola-Vásquez, J.

AU - Ridnaia, A. V.

AU - Ronchini, S.

AU - Rossi, A.

AU - Mata-Sánchez, D.

AU - Schneider, B.

AU - Shen, R. F.

AU - Thakur, A. L.

AU - Tohuvavohu, A.

AU - Torres, M. A.P.

AU - Tsvetkova, A. E.

AU - Ulanov, M. V.

AU - Wei, J. J.

AU - Xiao, D.

AU - Yin, Y. H.I.

AU - Bai, M.

AU - Burwitz, V.

AU - Cai, Z. M.

AU - Chen, F. S.

AU - Chen, H. L.

AU - Chen, T. X.

AU - Chen, W.

AU - Chen, Y. F.

AU - Chen, Y. H.

AU - Cheng, H. Q.

AU - Cordier, B.

AU - Cui, C. Z.

AU - Cui, W. W.

AU - Dai, Y. F.

AU - Dai, Z. G.

AU - Eder, J.

AU - Eyles-Ferris, R. A.J.

AU - Fan, D. W.

AU - Feldman, C.

AU - Feng, H.

AU - Feng, Z.

AU - Friedrich, P.

AU - Gao, X.

AU - Gonzalez, J. F.

AU - Guan, J.

AU - Han, D. W.

AU - Han, J.

AU - Hou, D. J.

AU - Hu, H. B.

AU - Hu, T.

AU - Huang, M. H.

AU - Huo, J.

AU - Hutchinson, I.

AU - Ji, Z.

AU - Jia, S. M.

AU - Jia, Z. Q.

AU - Jiang, B. W.

AU - Jin, C. C.

AU - Jin, G.

AU - Jin, J. J.

AU - Keereman, A.

AU - Lerman, H.

AU - Li, J. F.

AU - Li, L. H.

AU - Li, M. S.

AU - Li, W.

AU - Li, Z. D.

AU - Lian, T. Y.

AU - Liang, E. W.

AU - Ling, Z. X.

AU - Liu, C. Z.

AU - Liu, H. Y.

AU - Liu, H. Q.

AU - Liu, M. J.

AU - Liu, Y. R.

AU - Lu, F. J.

AU - Lü, H. J.

AU - Luo, L. D.

AU - Ma, F. L.

AU - Ma, J.

AU - Mao, J. R.

AU - Mao, X.

AU - McHugh, M.

AU - Meidinger, N.

AU - Nandra, K.

AU - Osborne, J. P.

AU - Pan, H. W.

AU - Pan, X.

AU - Ravasio, M. E.

AU - Rau, A.

AU - Rea, N.

AU - Rehman, U.

AU - Sanders, J.

AU - Santovincenzo, A.

AU - Song, L. M.

AU - Su, J.

AU - Sun, L. J.

AU - Sun, S. L.

AU - Sun, X. J.

AU - Tan, Y. Y.

AU - Tang, Q. J.

AU - Tao, Y. H.

AU - Tong, J. Z.

AU - Wang, C. Y.

AU - Wang, H.

AU - Wang, J.

AU - Wang, L.

AU - Wang, W. X.

AU - Wang, X. F.

AU - Wang, X. Y.

AU - Wang, Y. L.

AU - Wang, Y. S.

AU - Wei, D. M.

AU - Willingale, R.

AU - Xiong, S. L.

AU - Xu, H. T.

AU - Xu, J. J.

AU - Xu, X. P.

AU - Xu, Y. F.

AU - Xu, Z.

AU - Xue, C. B.

AU - Xue, Y. L.

AU - Yan, A. L.

AU - Yang, F.

AU - Yang, H. N.

AU - Yang, X. T.

AU - Yang, Y. J.

AU - Yu, Y. W.

AU - Zhang, J.

AU - Zhang, M.

AU - Zhang, S. N.

AU - Zhang, W. D.

AU - Zhang, W. J.

AU - Zhang, Y. H.

AU - Zhang, Z.

AU - Zhang, Z. L.

AU - Zhao, D. H.

AU - Zhao, H. S.

AU - Zhao, X. F.

AU - Zhao, Z. J.

AU - Zhou, L. X.

AU - Zhou, Y. L.

AU - Zhu, Y. X.

AU - Zhu, Z. C.

AU - Zuo, X. X.

PY - 2025

Y1 - 2025

N2 - 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 (~3,600°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.

AB - 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 (~3,600°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.

UR - http://www.scopus.com/inward/record.url?scp=85217262980&partnerID=8YFLogxK

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U2 - 10.1038/s41550-024-02449-8

DO - 10.1038/s41550-024-02449-8

M3 - Article

AN - SCOPUS:85217262980

SN - 2397-3366

JO - Nature Astronomy

JF - Nature Astronomy

ER -

Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a

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