{
  "submittedHow": "email",
  "body": "A. Moskvitin (SAO), V. Rumyantsev (CrAO), N. Pankov (IKI),\nA. Volnova (IKI), A. Pozanenko (IKI) report on behalf of SAO GRB\nfollow-up team and IKI GRB-FuN.\n\nWe observed the field of the GRB 260924A discovered by Fermi\n(The Fermi GBM team, GCN 45712; Holzmann Airasca et al., GCN 45721;\nMcDermott et al., GCN 45723), Swift (D'Elia et al., GCN 45713;\nEvans et al., GCN 45715; Dichiara et al., GCN 45730; Gupta et al.,\nGCN 45733), AstroSat CZTI (Salunke et al., GCN 45720), NuSTAR\n(Waratkar and Grefenstette, GCN 45732), SVOM (Yu et al., GCN 45741),\nKonus-Wind (Ridnaia et al., GCN 45751) with the Shajn 2.6-m telescope\n(ZTSh) of CrAO on 2026-10-04T01:17:57--2026-10-04T02:42:40 UT.\n\nThe OT (Hu et al., GCN 45717; Izzo et al., GCN 45718;\nVijaykumar et al., GCN 45734; Klingler and D'Elia, GCN 45735;\nCastro-Tirado et al., GCN 45740; Novotny et al., GCN 45743;\nAryan et al., GCN 45748; Fortin et al., GCN 45759; Pankov et al.,\nGCN 45774; Kuin et al., GCN 45775; also observed in NIR:\nMa et al., GCN 45736; Mo et al., GCN 45762; and in radio:\nGulati et al., GCN 45776) is marginally detected in our\nstacked image. The observation details are as follows:\n\nDate       UT start  t-T0       Exp,    Filter Obj      Err   UL\n                     (mid,days) (n*s)                         (3sigma)\n2026-10-04 01:17:57  10.03259   40*120  R      22.8 +/- 0.3   23.1\n\nThis preliminary photometry (Vega) is based on nearby USNO-B1.0\nstars and not corrected for the Galactic extinction.\n",
  "circularId": 46149,
  "eventId": "GRB 260924A",
  "createdOn": 1793805011910,
  "submitter": "Alexander Moskvitin at SAO RAS <mosk@sao.ru>",
  "subject": "GRB 260924A: CrAO ZTSh optical observations"
}