{
  "bibcode": "2014GCN.16141....1V",
  "body": "A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev\n(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up \ncollaboration:\n\nWe observed the field of the Swift GRB 140419A (Marshall et al., GCN\n16118) with AZT-33IK telescope of Sayan observatory (Mondy) on Apr. \n19-21. We took several images in R-filter of 60 s exposure. On stacked \nimages we clearly detected the optical afterglow (Zheng et al., GCN \n16119; Guver et al., GCN 16120; Butler et al., GCN 16121; Kuin et al.,\nGCN 16123; Hentunen et al., GCN 16126) except the combined image of\nApr. 19 due to unfavorable weather conditions. Our photometry is \nconsistent with the decaying law derived from RATIR observations \n(Littlejohns et al., GCNs 16139, 16136).\n\nThe details of the photometry are the following:\n\ndate        UT start   t-T0     Filter  Exp.  OT             Uplim\n                       (mid, days)       (s)                 3sigma\n\n2014-04-19 16:26:35   0.52030   R      10*60  n/d             19.3\n2014-04-20 14:49:15   1.47495   R      83*60  21.12 +/- 0.10  21.6\n2014-04-21 14:58:36   2.49015   R     107*60  21.60 +/- 0.15  22.2\n\nThe photometry is based on nearby SDSS star, R (gri -> R transformations \nby Lupton 2005):\n\nSDSS id              R\nJ082752.69+461357.4  17.381 +/- 0.018",
  "circularId": 16141,
  "createdOn": 1398177894000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 140419A: Mondy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 140419A"
}