{
  "bibcode": "2016GCN.18992....1M",
  "body": "E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A. Volnova \n(IKI), A. Kusakin (Fesenkov Astrophysical Institute),  A. Pozanenko \n(IKI) report on behalf of larger GRB follow-up collaboration:\n\nWe observed the Swift GRB 160131A (Page et al., GCN 18951) with \nZeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory \nstarting on Feb. 05 (UT) 14:22:45.  We obtained several images in R \nfilter. We clearly detect optical afterglow (Page et al., GCN 18951; \nYurkov et al., GCN 18952; Guidorzi et al., GCN 18953; Xin et al., GCN \n18954; Xin et al., GCN 18955; Watson et al., GCN 18956) in a combined \nimage. Preliminary photometry is following\n\n\nDate        UT start   t-T0    Filter   Exp.   OT     Err.\n                       (mid, days)       (s)\n\n\n2016-02-05  14:22:45   5.28802 R       21*300  22.40  0.20\n\nPhotometry is based on nearby USNO-B1.0 stars\n\nUSNO-B.1_id  R2\n\n0829-0078223 15.70\n0829-0078147 14.56\n0829-0078167 17.71\n0829-0078222 18.96\n0829-0078226 18.69\n0829-0078129 17.62",
  "circularId": 18992,
  "createdOn": 1454698187000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 160131A: TSHAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 160131A"
}