{
  "createdOn": 1743450512542,
  "eventId": "GRB 250329A",
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>",
  "circularId": 39985,
  "subject": "GRB 250329A: AbAO, Mondy and SAO RAS optical upper limits",
  "submittedHow": "email",
  "bibcode": "2025GCN.39985....1P",
  "body": "N. Pankov (HSE, IKI),  A. Pozanenko (IKI), E. Klunko (ISTP),\nR. Ya. Inasaridze (AbAO), A. S. Moskvitin (SAO RAS), O. I. Spiridonova (SAO\nRAS), Yu. V. Sotnikova (SAO RAS), A. Ghosh (CAPP,\nUniversity of Johannesburg), S. Razzaque (CAPP, University of Johannesburg)\nand IKI GRB-FuN report\n\nWe observed the field of GRB 250329A (Wang et al., GCN 39916;\nDichiara et al., GCN 39924) in the R filter with the 0.7-meter AS-32\ntelescope of the Abastumani Observatory (AbAO), in the R filter with the\n1.5-meter AZT-33IK telescope of the Sayan Solar Observatory (Mondy) and in\nthe Rc filter with the 1-meter Zeiss-1000 of SAO RAS.\n\nWe do not detect the OT (Watson et al., GCN 39915; Wang et al.,\nGCN 39917; Schneider et al., GCN 39918; Ghosh et al., GCN 39922; Ferro et\nal., GCN 39927) down to the following limits.\n\nDate UT start t-T0 Filter Exp. UL(3sigma) Telescope\n(mid, d) (s)\n2025-03-29 17:07:10 0.56824 R 98 x 60 21.7 AS-32\n2025-03-29 19:11:57 0.64726 R 38 x 120 22.7 AZT-33IK\n2025-03-29 20:00:02 0.66837 Rc 7 x 300 22.3 Zeiss-1000\n\nPhotometry is based on nearby USNO-B1.0 stars and is not corrected for\nGalactic extinction\nRA Dec R2\n197.4269 9.4669 15.26\n197.4732 9.4981 13.49\n197.4408 9.5091 15.64\n"
}