{
  "submitter": "Alina Volnova at IKI RAS <alinusss@gmail.com>",
  "eventId": "EP260119a",
  "createdOn": 1769083782174,
  "subject": "EP260119a: Assy AZT-20 optical observations",
  "bibcode": "2026GCN.43500....1V",
  "body": "A. Volnova (IKI), A. Pozanenko (IKI), M. Krugov (FAI), N. Pankov (IKI) report on behalf of IKI-GRB-FuN:\n\nWe observed the field of the EP260119a (Jiang et al., GCN 43447; GCN 43465; Cheng et al., GCN 43449) at the redshift of z ~ 5.47 (Corcoran et al., GCN 43469) with the AZT-20 telescope of Assy-Turgen observatory starting on 2026-01-20 (UT) 14:53 and taking several 60-second exposures in i' filter. \nIn the stacked frame we detect the optical counterpart (Fortin et al., GCN 43450; GCN 43455; Eyles-Ferris et al., GCN 43452; Moskvitin and Spiridonova, GCN 43463; Liu et al., GCN 43464; Ma et al., GCN 43466; Zheng et al., GCN 43468; Corcoran et al., GCN 43469; Bochenek and Perley, GCN 43472; Pankov et al., GCNs 43476, 43499; Jin et al., GCN 43496). Preliminary photometry and observational details are the following:\n\nDate           UT start  t-T0       Exp.    Filter Obj.   Err.   UL       Site/Telescope     \n                        (mid,days)  (n*s)                       (3sigma)\n2026-01-20     14:53:00  1.63500    63*60   i'     22.7   0.2    23.2     Assy-Turgen/AZT-20\n\nThe photometry is based on several nearby SDSS stars (i-magnitudes) and is not corrected for the Galactic extinction.",
  "submittedHow": "web",
  "circularId": 43500,
  "format": "text/plain"
}