高红移伽马暴EP240315a的软x射线提示辐射

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2025-01-23 DOI:10.1038/s41550-024-02449-8

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

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引用次数: 0

摘要

长伽马射线暴（GRBs）被认为起源于大质量恒星的核心坍缩。高红移伽马射线暴可以探测早期宇宙的恒星形成和再电离历史，但它们的探测仍然很少。本文报道了爱因斯坦探测器（EP）任务上的宽视场x射线望远镜（WXT）在0.5-4 keV波段探测到触发的GRB，命名为EP240315a，其明亮峰也被Swift突发警报望远镜和Konus-Wind通过离线分析检测到。在红移z = 4.859处，EP240315a在软x射线波段的光曲线比在伽马射线波段的光曲线长得多，也复杂得多。EP-WXT得益于大视场（~ 3600°2）和高灵敏度，可通过连续检测捕获早期发动机激活，并扩展后期发动机活动。EP240315a的x射线通量峰值位于先前已知的高z伽玛射线暴的微弱端，这表明EP通过伽玛射线暴研究早期宇宙的巨大潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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

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

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.

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

期刊介绍： Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas. Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence. In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.