Soft X-ray prompt emission from the high-redshift gamma-ray burst EP240315a
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期刊论文
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发表日期：
2025年1月23日
- 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. 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
摘要
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.