{
  "circularId": 46187,
  "eventId": "GRB 261103A",
  "subject": "GRB 261103A: SVOM/VT optical upper limits",
  "submitter": "Huali Li at at NAOC, SVOM <lhl@nao.cas.cn>",
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "submittedHow": "web",
  "body": "H. L. Li, Y. N. Ma, C. Wu, L. P. Xin, Y. L. Qiu, Z. H. Yao, J. R. Xu, L. J. Chen, X. H. Han, J. Wang, Y. Xu, P. P. Zhang, W. J. Xie, Y. J. Xiao, H. B. Cai, J. S. Deng, J. Y. Wei (NAOC), J. T. Palmerio (CEA/Irfu), Y. H.Cheng (YNU), W. L.Zhang (PMO) report on behalf of the SVOM/VT team.\n\nSVOM/VT performed a ToO observation on the burst GRB 261103A triggered by SVOM/ECLAIRs (Brunet et al., GCN 46137, 46176). The observation started at 2026-11-03T11:59:33 UTC, about 5.15 hr in VT_B (400nm-650nm) and VT_R (650nm-1000nm) channels simultaneously.\n \nNo credible uncatalogued candidates were identified in the stacked images within the ECLAIRs  error box (Bernardini et al., GCN 46150), compared with the Legacy Survey, down to 22.0 mag in AB magnitudes, at the mid-time of 6.9 hr post trigger.\n\nOur non-detection is consistent with the reports from LCO (Guan et al., GCN 46138) and SVOM/C-GFT (Yin et al.., GCN 46157).\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.",
  "createdOn": 1794103012466,
  "format": "text/plain"
}