{
  "body": "A. Volnova (IKI), A. Pozanenko (IKI), M. Krugov (FAI) report on behalf of IKI-GRB-FuN:\n\nWe observed the field of the EP transient EP251023a (Wu et al., GCN 42388) in r' filter with the AZT-20 1.5m telescope of Assy-Turgen observatory starting on Oct., 23, 2025 (UT) 20:25:35, taking several exposures of 60 seconds. The optical counterpart (Wortley et al., GCN 42387; Li et al., GCN 42389; Liu et al., GCN 42391; Mandarakas et al., GCN 42400; Lipunov et al., GCN 42405; Selezneva et al., GCN 42406; Mohan et al., GCN 42411; Rakotondrainibe et al., GCN 42420; Rajabov et al., GCN 42422; Volnova et al., GCN 42468; Volnova et al., GCN 42716) is clearly detected in the stacked frame. The preliminary photometry is the following:\n\nDate        UT start  t-T0       Exp.   Filter  OT     Err.  UL\n                     (mid,days)  (n*s)                      (3sigma)\n2025-10-23  20:25:35  0.76378    30*60  r'      20.22  0.06  22.2\n\nThe photometry is based on several nearby PS1 stars (AB-system) and is not corrected for the Galactic extinction.",
  "bibcode": "2025GCN.42717....1V",
  "eventId": "EP251023a",
  "subject": "EP251023a: Assy AZT-20 optical observations",
  "submittedHow": "web",
  "circularId": 42717,
  "createdOn": 1763384837049,
  "format": "text/plain",
  "submitter": "Alina Volnova at IKI RAS <alinusss@gmail.com>"
}