NUK - logo
E-viri
Celotno besedilo
Odprti dostop
  • Soft X-ray prompt emission from a high-redshift gamma-ray burst EP240315a
    Liu, Y; Sun, H; D Xu; Tanvir, N R; Gao, H; X -F Wu; Zhang, B; Yuan, W; J An; Frederiks, D D; Ghirlanda, G; C -K Li; J -D Li; Piro, L; Troja, E; Vergani, S D; A de Ugarte Postigo; Gianfagna, G; Y -D Hu; S -Q Jiang; Julakanti, Y; Kuulkers, E; D -Y Li; Y Li; Littlefair, S P; Liu, X; Lysenko, A L; Y -N Ma; Martin-Carrillo, A; Parsotan, T; Ridnaia, A V; Ronchini, S; Mata-Sanchez, D; Tsvetkova, A E; J -J Wei; Xiao, D; Y -H I Yin; Bai, M; Chen, T -X; Chen, W; H -Q Cheng; W -W Cui; Z -G Dai; D -W Fan; Feldman, C; Feng, H; Feng, Z; Gao, X; D -W Han; H -B Hu; Hutchinson, I; S -M Jia; Z -Q Jia; Jin, G; J -J Jin; J -F Li; T -Y Lian; Ling, Z -X; H -Y Liu; H -Q Liu; Y -R Liu; L -D Luo; J Ma; Meidinger, N; Osborne, J P; H -W Pan; Pan, X; Ravasio, M E; Rau, A; Rea, N; Rehman, U; Sanders, J; Santovincenzo, A; L -M Song; J Su; L -J Sun; S -L Sun; Y -Y Tan; Q -J Tang; J -Z Tong; Wang, W -X; X -Y Wang; D -M Wei; Willingale, R; S -L Xiong; J -J Xu; X -P Xu; Y -F Xu; A -L Yan; X -T Yang; Zhang, J; Zhang, M; W -J Zhang; Y -H Zhang; Zhang, Z; H -S Zhao; X -F Zhao; Zhou, L -X; Y -L Zhou; Zhu, Y -X

    arXiv (Cornell University), 04/2024
    Paper, Journal Article

    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.

Vnos na polico