{
  "subject": "EP251124a: Mondy optical upper limit",
  "createdOn": 1765367755012,
  "body": "A. A. Volnova (IKI), E. Klunko (ISTP), A. S. Pozanenko, N. S. Pankov (HSE, IKI) (IKI) report on behalf of IKI-GRB-FuN:\n\nWe observed the field of the EP251124a triggered by EP/WXT (Zhou et al., GCN 42816; GCN 42832) with the AZT-33IK 1.5m telescope of the Sayan Solar Observatory (Mondy) taking several 120-second expositions in R-band starting on Nov.24 UT 14:36:01 in the R filter. In the error boxes reported by Zhou et al. (GCN 42816) we do not detect any new optical transient in the stacked frame. The photometry and observational details are the following: \n\nDate        UT start  t-T0       Exp.    Filter   UL         Site/Telescope\n                     (mid,days)  (n*s)           (3sigma)\n2025-11-24  14:36:01  0.16386    30*120  R        22.3       Mondy/AZT-33IK\n\nThe photometry is based on several nearby stars from the USNO-B1 catalogue (R2 magnitudes) and is not corrected for the Galactic extinction.\n\nOur upper limit is in agreement with previously reported limits (Mohan et al., GCN 42817; Wang et al., GCN 42824; Lipunov et al., GCN 42828; van Hoof et al., GCN 42829; Ma et al, GCN 42833; Gillanders et al., GCN 42862).",
  "eventId": "EP251124a",
  "bibcode": "2025GCN.43063....1V",
  "submittedHow": "web",
  "submitter": "Alina Volnova at IKI RAS <alinusss@gmail.com>",
  "circularId": 43063,
  "format": "text/plain"
}