{
  "format": "text/plain",
  "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), M. G. Bernardini (INAF/LUPM), M. Gnaoui (IAP) and R. Hamburg (USRA) report on behalf of the SVOM/VT team.\n\nSVOM/VT performed an automatic slew on the burst GRB 261104A triggered by SVOM/ECLAIRs (sb26110402, Bernardini et al., GCN 46150). The observation started at 2026-11-04T21:31:59 UTC, about 0.92 hr in VT_B (400nm-650nm) and VT_R (650nm-1000nm) channels simultaneously.\n \nNo credible uncatalogued candidates were identified the stacked images within the ECLAIRs  error box (Bernardini et al., GCN 46150), compared with the Legacy Survey.\n\nPreliminary upper limits are estimated in AB magnitudes and are not corrected for Galactic extinction:\n\nMid time | Band | Exposure Time |  5-sigma upper limit\n1.10 h     VT_B      50*20 s       > 22.5 mag    \n1.10 h     VT_R      50*18 s       > 22.5 mag\n\nOur non-detection is consistent with the reports from LCO (Yin et al., GCN 46154).\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.",
  "eventId": "GRB 261104A",
  "submitter": "Huali Li at at NAOC, SVOM <lhl@nao.cas.cn>",
  "circularId": 46161,
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "submittedHow": "web",
  "subject": "GRB 261104A: SVOM/VT optical upper limits",
  "createdOn": 1793895626196
}