{
  "bibcode": "2017GCN.22223....1V",
  "body": "A. Volnova (IKI), A. Moskvitin (SAO RAS), A. Pozanenko (IKI) report on \nbehalf of of larger GRB follow-up collaboration:\n\nWe observed the field of GRB 171205A (D'Elia et al., GCN 22177)   with \nZeiss-1000  telescope of SAO-RAS Observatory starting on Dec. 09 (UT) \n01:07:09. We took several images in R-filter.  The afterglow of GRB \n171205A (Izzo et al. GCN 22180; Emery et al. GCN 22181; Butler et al. \nGCN 22182; Mao et al. GCN 22186; Choi et al. GCN 22188; Melandri et al. \nGCN 22189; Steeghs et al. GCN 22190; Cobb et al. GCN 22192; Volnova et \nal. GCN 22193; Guidorzi et al. GCN 22197; Schmidl et al. GCN 22198; \nLipunov et al. GCN 22199;  Ugarte Postigo et al. GCN 22204)  is clearly \ndetected. Preliminary photometry is following.\n\nDate        UT start  t-T0    Filter Exp.    OT     Err.  UL\n                      (mid, days)    (s)\n\n2017-12-09  01:07:09 3.79078  R      22*300  18.60  0.04  22.5\n\nThe photometry is based on several nearby USNO-B1.0 stars previously \nused in GCN 22193.",
  "circularId": 22223,
  "createdOn": 1512900157000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 171205A: SAO-RAS optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 171205A"
}