{
  "bibcode": "2014GCN.15856....1V",
  "body": "A. Volnova (IKI), N. Tungalag (Research Centre of Astronomy and \nGeophysics MAS), S. Schmalz (AIP), V. Voropaev (KIAM), I.Molotov (KIAM), \nA. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:\n\nWe observed the field of the Swift Swift GRB 140211A (Cummings et al., \nGCN 15816) with ORI-40 telescope of Khureltogot observatory (Mongolia) \nstarting on Feb., 11 (UT) 12:29:12, i.e., ~6 minutes after the trigger. \nWe took several unfiltered images of 60 s exposure. Within the enhanced \nBAT error circle (Cummings et al., GCN 15820) we do not detect any \noptical counterpart in differently stacked images.\n\nDetails of the photometry are following:\n\nUT start-end        t-T0       Exp.   Filter  OT    UL (3 sigma)\n                    (mid, days) (s)\n12:29:12-12:30:12   0.00450    1*60   None    n/d    17.0\n12:29:12-12:40:31   0.00819   10*60   None    n/d    18.0\n12:29:12-15:18:33   0.10468  100*60   None    n/d    18.8\n\nThe photometry is based on reference stars SDSS-DR9, (R mag,\ntransformation by Lupton 2005):\n\nN   SDSS_id               R(Lupton)\n1   J081706.72+201335.6   18.171\n2   J081655.77+201624.8   18.078",
  "circularId": 15856,
  "createdOn": 1392667250000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 140211A: Khureltogot optical upper limits",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 140211A"
}