{
  "format": "text/plain",
  "submitter": "Liping Xin at NAOC, SVOM <xlp@nao.cas.cn>",
  "body": "SVOM/VT commissioning team: Y. L. Qiu, H. L. Li, L. P. Xin, C. Wu, X. H. Han, J. Wang, W. J. Xie, H. B. Cai, Y. Xu, Y. J. Xiao, P. P. Zhang, J. S. Deng, L. Lan, X. M. Lu, R. S. Zhang, D. H. Zhao (NAOC), J. Zhang, L. J. Dan, G. Y. Zou, C. J. Wang, Y. F. Du, C. Huang (XIOPM), R.-Z. Li, J. X. Cao, D. F. Kong (GXU) and Y. Wang (PMO, CAS) \n\nSVOM 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)\nreport on behalf of the SVOM team:\n\nGRB 250103A  (Wang et al., GCN 38786) was observed by on-board VT after the automatic slew of the platform. The VT conducted observations in VT_B (400nm-650nm) and VT_R (650nm-1000nm) channel simultaneously. \n\nWith the X band downlinked data, the optical candidate reported (Li et al., GCN 38795) was detected in VT_B and VT_R band images.  \n\nIts brightness was rising for 1.0 mag from 500 sec to 2000 sec after the burst and then decays. The magnitude was VT_B=21.8+/0.1 mag and VT_R=20.1+/0.1 mag in AB magnitude, at about 8000 seconds post the trigger. \n\nWe confirm that this source is the optical counterpart of the burst.\n\nThe 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. VT was jointly developed by Xi'an Institute of Optics and Precision Mechanics (XIOPM), CAS and National astronomical observatories (NAOC),CAS.",
  "bibcode": "2025GCN.38802....1S",
  "createdOn": 1735923553697,
  "eventId": "GRB 250103A",
  "subject": "GRB 250103A: SVOM/VT optical counterpart confirmation",
  "submittedHow": "web",
  "circularId": 38802
}