Gamma-ray Burst 241128B

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN Circular #38388
  SVOM/GRM team: Wang-Chen Xue, Chao Zheng, Chen-Wei Wang, Shi-Jie Zheng, Yong-Wei Dong, Jiang-Tao Liu, Jian-Chao Sun, Yue Huang, Jiang He, Min Gao, Hao-Xuan Guo, Lu Li, Yong-Ye Li, Hong-Wei Liu, Xin Liu, Hao-Li Shi, Li-Ming Song, You-Li Tuo, Wen-Long Zhang, Wen-Jun Tan, Hao-Xi Wang, Jin Wang, Jin-Zhou Wang, Ping Wang, Rui-Jie Wang, Yu-Xi Wang, Bo-Bing Wu, Shao-Lin Xiong, Jian-Ying Ye, Yi-Tao Yin, Wen-Hui Yu, Fan Zhang, Li Zhang, Peng Zhang, Shuang-Nan Zhang, Yan-Qiu Zhang, Yan-Ting Zhang, Shu-Min Zhao, Xiao-Yun Zhao (IHEP), Maria-Grazia Bernardini (LUPM/INAF-OAB), Laurent Bouchet (IRAP), David Corre (CEA), Tais Maiolino (LUPM), Frédéric Piron (LUPM), Stéphane Schanne (CEA), Jingwei Wang (IAP), JeanLuc Attéia (IRAP)
  SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), Olivier Godet (IRAP), Andrea Goldwurm (APC), Diego Götz (CEA), Xu-Hui Han (NAOC), Cyril Lachaud (APC), En-Wei Liang (GXU), Yu-Lei Qiu (NAOC), Susanna Vergani (Obs.Paris), Jing Wang (NAOC), Chao Wu (NAOC), Li-Ping Xin (NAOC), Shao-Lin Xiong (IHEP), Bing Zhang (UNLV)
  report on behalf of the SVOM team:
  During the commissioning phase, SVOM/GRM was triggered in-flight by a short burst (SVOM trigger reference: sb24112801) at 2024-11-28T05:22:24.000 UTC (T0).
  With the event-by-event data downloaded through the X-band ground station, the GRM light curve shows that this burst consists of multiple pulses with a duration of about 10 s.
  The SVOM/GRM light curve can be found here: https://www.bursthub.cn//admin/static/svgrb241128B.png
  The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. GRM is developed by the Institute of High Energy Physics (IHEP) of CAS.
  The SVOM/GRM point of contact for this burst is: Wang-Chen Xue (IHEP)(xuewc@ihep.ac.cn)
  
• GCN Circular #38399
  A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams,
  J. Benkhoff on behalf of the BepiColombo team,
  D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team,
  E. Burns on behalf of the IPN,
  E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
  and
  W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report:
  The bright, long-duration GRB 241128B (SVOM-GRM detection: Xue et al., GCN 38389) Konus-Wind, INTEGRAL (SPI-ACS), SVOM (GRM), Mars-Odyssey (HEND), and BepiColombo (MGNS), at about 19346 s UT (05:22:26).
  We have triangulated it to a preliminary, 3 sigma error region whose area is 880 sq. arcmin, and its maximum dimension is 7.9 deg (the minimum one is 2.1 arcmin).
  This localization may be improved.
  A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB241128_T19346/IPN The HEALPix triangulation maps are in units of probability density.
  The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.