{
  "createdOn": 1740222650589,
  "bibcode": "2025GCN.39422....1P",
  "eventId": "GRB 250221A",
  "submittedHow": "email",
  "body": " N. Pankov (HSE, IKI), V. Kim (FAI), M. Krugov (FAI), Y. Aimuratov (FAI),\nA. Volnova(IKI), A. Pozanenko (IKI) report on behalf of IKI GRB FuN:\n\nWe observed the optical afterglow (Francile et al., GCN 39395; Watson et\nal., GCN 39397; Melandri et al., GCN 39406; Shilling et al., GCN 39409; Guo\net al., GCN 39412; Muenter et al., GCN 39417; Palmerio et al., GCN 39418)\nof the Swift GRB 250221A (Caputo et al., GCN 39396) with AZT-20 telescope\nof Assy-Turgen observatory starting on 2025-02-21 (UT) 15:25:09.55 in r'\nfilter.\n\nThe afterglow is clearly detected. Preliminary photometry of the OT in the\nstacked image is the following\n\nDate UT start t-T0 Exp. Filter OT Err. UL(3sigma)\n\n2025-02-21 15:25:09 0.50385 30x60 r' 20.90 0.05 22.8\n\nThe photometry is based on nearby PS1 stars.\n",
  "circularId": 39422,
  "submitter": "Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>",
  "subject": "GRB 250221A: Assy optical observations"
}