{
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>",
  "body": "A. Volnova (IKI), A. Pozanenko (IKI), V. Rumyantsev (CrAO), N. Pankov (HSE,\nIKI) report on behalf of GRB-IKI-FuN collaboration:\n\nWe observed the GRB 241229B (Fermi GBM Team, GCN 38698; D'Ai et al., GCN\n38699) with 2.6-meter ZTSh telescope of CrAO. The observations started on\n2024-12-29 (UT) 20:22:02, i.e. ~15.4 hours after GBM trigger.\n\nWe clearly detected SVOM/VT optical candidate (SVOM/VT team, GCN 38729).\nThe preliminary photometry of the the optical candidate is the following:\n\nDate UT start T0+ Exp. Filter OT Err. UL(3sigma)\n(mid, days) (s)\n\n2024-12-29 20:22:02 0.64631 88x120 R 21.91 0.05 24.2\n\nThe magnitudes are calibrated using nearby Pan-Starrs PS1 (transformed into\nR by Lupton's transformations)\n\nRA Dec R_Lupton\n18:16:50.10 +74:41:42.2 18.928 +- 0.020\n18:16:33.99 +74:41:43.6 18.778 +- 0.026\n18:16:26.64 +74:41:33.2 17.917 +- 0.014\n",
  "eventId": "GRB 241229B",
  "circularId": 38732,
  "createdOn": 1735589799893,
  "bibcode": "2024GCN.38732....1V",
  "subject": "GRB 241229B: CrAO ZTSh possible optical counterpart of SVOM/VT confirmation",
  "submittedHow": "email"
}