{
  "bibcode": "2014GCN.17106....1M",
  "body": "A.S. Moskvitin and V.N. Komarova report on behalf of a larger team:\n\nWe observed the field of GRB 141121A (Lien et al., GCN 17075)\nwith the SAO RAS 1-m Zeiss-1000 telescope at three nights:\n2014.11.24/25, 25/26, 26/27.\n\nThe GRB OT (Tanga et al., GCN 17078) is clearly detected\nin our stacked frames each night. Our charts can be found at\nftp://ftp.sao.ru/pub/grb/GRB141121A/GRB141121A_z1000_24_25_26.jpg\n\nWe used nearby SDSS stars for calibration. The \"ugriz\" magnitudes\nwere converted to \"UBVRI\" with the Lupon-2005 equations. Our OT\nbrightness measurements are in good agreement with R-band values\nestimated within the close epochs and reported in the GCN circulars:\nKuroda et al. (GCN 17098), Mazaeva et al. (GCN 17102). Our OT\nmagnitudes are also similar to r-band measurements by Watson et al.\n(GCN 17100) and Butler et al. (GCN 17101).\nOur preliminary results are presented in the following table:\n-----------------------------------------------------\nDate   T-T0  UT_start-end Exp.,s  R_mag\n-----------------------------------------------------\n24.942 3.782 20:14--00:59  900 20.31+/-0.09\n25.956 4.796 22:16--23:38 3600 20.86+/-0.04\n26.980 5.820 22:12--00:50 4800 21.36+/-0.09\n-----------------------------------------------------",
  "circularId": 17106,
  "createdOn": 1417112634000,
  "email": "sokolov@sao.ru",
  "subject": "GRB 141121A: three epochs of SAO RAS optical observations",
  "submitter": "Vladimir Sokolov at SAO RAS  <sokolov@sao.ru>",
  "eventId": "GRB 141121A"
}