{
  "circularId": 45489,
  "createdOn": 1788273203805,
  "subject": "GRB 260831B / sb26083106:  SVOM/VT optical variability of V* GK Per ",
  "eventId": "GRB 260831B",
  "submittedHow": "web",
  "submitter": "Huali Li at at NAOC, SVOM <lhl@nao.cas.cn>",
  "eventType": [
    "GRB",
    "Optical Transient"
  ],
  "body": "H. L. Li, L. P. Xin, C. Wu, Y. N. Ma, Y. L. Qiu, Z. H. Yao, J. R. Xu, 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) and C. Guepin (LUPM) report on behalf of the SVOM/VT team.\n\nSVOM/VT performed  observations with automatic slew of the SVOM/ECLAIRs trigger sb26083106 (Godet et al., GCN 45477, 45486) starting from 2026-08-31T18:46:36 UT, about 10 minutes post trigger in the VT_B (400-650 nm) and VT_R (650-1000 nm) channels simultaneously. \n\nThe classical nova mentioned by Godet et al. (GCN 45486) during our observations showed  a fluctuating variation with the amplitude of about 0.2 mag in both channels.  \n\nWe also searched for uncatalogued sources within the SVOM/ECLAIRs error box (Godet et al., GCN 45477). In our images no uncatalogued sources were detected down to 5-sigma upper limits of about 22.5 mag (AB) in both channels at the mid time of 18.3 minutes post trigger.\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.",
  "format": "text/plain"
}