{
  "bibcode": "2015GCN.18189....1M",
  "body": "E. Mazaeva (IKI), E. Klunko (ISTP), A. Volnova (IKI), I. Korobtsev \n(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up \ncollaboration:\n\nWe continue observations of  the of Swift GRB 150818A (D'Elia et al., \nGCNC 18152) with AZT-33IK telescope of Sayan observatory (Mondy).   We \nobtained several images in R-filter   starting on Aug., 20 (UT) \n16:54:32.  The optical transient (Marshall et al., GCN 18155; McCauley \net al., GCN 18161; Schulze  et al., GCN 18164; Mazaeva et al., GCN \n18175) is clearly visible. Preliminary photometry of the optical \ntransient is following\n\nDate       UT start   t-T0     Filter   Exp.    OT    Err.\n                       (mid, days)       (s)\n\n2015-08-20 16:54:32   2.23334  R        15*120  21.15 0.09\n\nPhotometry is based on USNO-B1.0 stars referenced in (Mazaeva et al., \nGCN 18175).\n\nThe continued shallow decay mentioned in Schulze et al. (GCN 18179) \nindeed can be explained by underlying host galaxy (Sanchez-Ramirez et \nal., GCN 18177).",
  "circularId": 18189,
  "createdOn": 1440171564000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 150818A: continued Mondy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 150818A"
}