{
  "bibcode": "2022GCN.31426....1M",
  "body": "A. Moskvitin (SAO) and A. Medvedev (SAO),\non behalf of larger GRB follow-up team report:\n\nWe observed the field of GRB 220107A (The Fermi GBM team, GCN 31399;\nKunzweiler et al. GCN 31400; DeLaunay et al. GCN 31402; Suresh et al.,\nGCN 31408) with the SAO RAS 1-m telescope Zeiss-1000 + CCD-photometer.\n6 x 300 sec. images were obtained in Rc band on January 9,\n22:27:09 -- 23:10:20 UT (T_mid - T0 = 2.3356 days).\n\nThe OT (Hosokawa et al. GCN 31413; Siegel GCN 31415; Zhu et al.\nGCN 31416; Pankov et al., GCN 31419; Moskvitin et al., GCN 31422;\nCastro-Tirado et al., GCN 31423) is clearly visible in the stacked\nframe. Preliminary photometry of the afterglow is R = 21.01 +/- 0.04\n(based on nearby SDSS-DR12 stars mentioned in GCN 31422).",
  "circularId": 31426,
  "createdOn": 1641771653000,
  "email": "mosk@sao.ru",
  "subject": "GRB 220107A: further SAO RAS optical observations",
  "submitter": "Moskvitin Alexander at SAO RAS  <mosk@sao.ru>",
  "eventId": "GRB 220107A"
}