{
  "bibcode": "2016GCN.18920....1M",
  "body": "E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Kusakin \n(Fesenkov Astrophysical Institute), A. Volnova (IKI), A. Pozanenko (IKI) \nreport on behalf of a larger GRB follow-up collaboration:\n\nWe observed the field of the Swift GRB 160121A (Hagen  et al., GCN 18912) \nwith Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory \nstarting on Jan. 21 (UT) 16:04:44.  We obtained several images in R filter. \nWe detect afterglow  (Oates et al., GCN 18917) in a combined image within \ncenter of the enhanced Swift-XRT position (Osborne et al., GCN 18918). \nPreliminary photometry of the afterglow is following\n\nDate       UT start    t-T0     Filter  Exp.    OT     Err\n                        (mid, days)      (s)\n\n2016-01-21 16:04:44    0.12598  R       29*180  20.26  0.22\n\n\nThe photometry is based on nearby USNO-B1.0 stars.\n\nUSNO-B1.0_id    R2\n0664-0122909    16.87\n0664-0122918    16.73\n0664-0122943    17.72\n0664-0123015    18.03\n0663-0123485    16.91",
  "circularId": 18920,
  "createdOn": 1453423008000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160121A: TSHAO optical afterglow confirmation",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160121A"
}