{
  "bibcode": "2022GCN.31420....1M",
  "body": "A. S. Moskvitin (SAO), N. Pankov (HSE, IKI),  A. S. Medvedev (SAO), S. \nBelkin (IKI), A. Pozanenko (IKI)  report on behalf of GRB IKI FuN:\n\nWe observed Swift GRB 220101A (Tohuvavohu, et al., GCN 31347) also\ndetected by Fermi/LAT (Arimoto et al. 2022, GCN 31350), AGILE (Ursi et\nal. 2022, GCN 31354), and Fermi/GBM (Lesage et al. 2022, GCN 31360) with \nZeiss-1000 telescope of SAO RAS in Rc-filter starting on 2022-01-08 (UT) \n15:40:16.\n\nWe detected the afterglow (Tohuvavohu et al., GCN 31347; Kuin & \nTohuvavohu, GCN 31351; Fu et al., GCN 31353; Hentunen et al., GCN\n31356; Perley et al., GCN 31357; de Ugarte Postigo et al., GCN 31358;\nFynbo et al., GCN 31359; Vinko et al., GCN 31361; Tomasella et al., GCN\n31363; Mao et al., GCN 31364; Noschese et al., GCN 31366; Mao et al., \nGCN 31368; Guelbenzu, et al., GCNs 31370, 31401; Strausbaugh et al., GCN \n31371; D'Avanzo et al., GCN 31373; Strausbaugh et al., GCNs 31383, \n31389; Dimple et al., GCN 31384; Romanov, GCN 31387; Caballero-Garcia, \nGCN 31388; Belkin et al., GCNs 31390, 31398; Gupta et al., GCN 31394; \nD'Avanzo et al., GCN 31395) in  a stacked image.\n\nPreliminary photometry of the afterglow is following\n\nDate       UT start   t-T0    Filter Exp.    OT   Err.  UL(3sigma)\n                        (mid, days)    (s)\n\n2022-01-08 15:40:16   7.46534   Rc   16*300  22.8 0.3   23.2\n\n\nThe photometry is based on the nearby SDSS-DR12 stars\nRA DEC R(Lupton transformations)\n00:05:20.64408 +31:45:46.0728 18.562\n00:05:34.81464 +31:45:50.5224 15.734\n00:05:32.53944 +31:44:51.9396 15.369\n00:05:36.69864 +31:44:42.4176 14.677",
  "circularId": 31420,
  "createdOn": 1641738125000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 220101A: SAO RAS optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 220101A"
}