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

Authors :
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.
Li, J. -D.
Malesani, D. B.
Piro, L.
Raman, G.
Ricci, R.
Troja, E.
Vergani, S. D.
Wu, Q. -Y.
Yang, J.
Zhang, B. -B.
Zhu, Z. -P.
Postigo, A. de Ugarte
Demin, A. G.
Dobie, D.
Fan, Z.
Fu, S. -Y.
Fynbo, J. P. U.
Geng, J. -J.
Gianfagna, G.
Hu, Y. -D.
Huang, Y. -F.
Jiang, S. -Q.
Jonker, P. G.
Julakanti, Y.
Kennea, J. A.
Kokomov, A. A.
Kuulkers, E.
Lei, W. -H.
Leung, J. K.
Levan, A. J.
Li, D. -Y.
Li, Y.
Littlefair, S. P.
Liu, X.
Lysenko, A. L.
Ma, Y. -N.
Martin-Carrillo, A.
O'Brien, P.
Parsotan, T.
Quirola-Vasquez, J.
Ridnaia, A. V.
Ronchini, S.
Rossi, A.
Mata-Sanchez, D.
Schneider, B.
Shen, R. -F.
Thakur, A. L.
Tohuvavohu, A.
Torres, M. A. P.
Tsvetkova, A. E.
Ulanov, M. V.
Wei, J. -J.
Xiao, D.
Yin, Y. -H. I.
Bai, M.
Burwitz, V.
Cai, Z. -M.
Chen, F. -S.
Chen, H. -L.
Chen, T. -X.
Chen, W.
Chen, Y. -F.
Chen, Y. -H.
Cheng, H. -Q.
Cui, C. -Z.
Cui, W. -W.
Dai, Y. -F.
Dai, Z. -G.
Eder, J.
Fan, D. -W.
Feldman, C.
Feng, H.
Feng, Z.
Friedrich, P.
Gao, X.
Guan, J.
Han, D. -W
Han, J.
Hou, D. -J.
Hu, H. -B.
Hu, T.
Huang, M. -H.
Huo, J.
Hutchinson, I.
Ji, Z.
Jia, S. -M.
Jia, Z. -Q.
Jiang, B. -W.
Jin, C. -C.
Jin, G.
Jin, J. -J.
Keereman, A.
Lerman, H.
Li, J. -F.
Li, L. -H.
Li, M. -S.
Li, W.
Li, Z. -D.
Lian, T. -Y.
Liang, E. -W.
Ling, Z. -X.
Liu, C. -Z.
Liu, H. -Y.
Liu, H. -Q.
Liu, M. -J.
Liu, Y. -R.
Lu, F. -J.
LU, H. -J.
Luo, L. -D.
Ma, F. L.
Ma, J.
Mao, J. -R.
Mao, X.
McHugh, M.
Meidinger, N.
Nandra, K.
Osborne, J. P.
Pan, H. -W.
Pan, X.
Ravasio, M. E.
Rau, A.
Rea, N.
Rehman, U.
Sanders, J.
Santovincenzo, A.
Song, L. -M.
Su, J.
Sun, L. -J.
Sun, S. -L.
Sun, X. -J.
Tan, Y. -Y.
Tang, Q. -J.
Tao, Y. -H.
Tong, J. -Z.
Wang, H.
Wang, J.
Wang, L.
Wang, W. -X.
Wang, X. -F.
Wang, X. -Y.
Wang, Y. -L.
Wang, Y. -S.
Wei, D. -M.
Willingale, R.
Xiong, S. -L.
Xu, H. -T.
Xu, J. -J.
Xu, X. -P.
Xu, Y. -F.
Xu, Z.
Xue, C. -B.
Xue, Y. -L.
Yan, A. -L.
Yang, F.
Yang, H. -N.
Yang, X. -T.
Yang, Y. -J
Yu, Y. -W.
Zhang, J.
Zhang, M.
Zhang, S. -N.
Zhang, W. -D.
Zhang, W. -J.
Zhang, Y. -H.
Zhang, Z.
Zhang, Z. -L.
Zhao, D. -H.
Zhao, H. -S.
Zhao, X. -F.
Zhao, Z. -J.
Zhou, L. -X.
Zhou, Y. -L.
Zhu, Y. -X.
Zhu, Z. -C.
Zuo, X. -X.
Publication Year :
2024

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 ($\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.<br />Comment: 41 pages, 8 figures, 7 tables

Subjects

Subjects :
Astrophysics - High Energy Astrophysical Phenomena

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2404.16425
Document Type :
Working Paper

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