{
  "bibcode": "2018GCN.22497....1M",
  "body": "E. Mazaeva (IKI), A. Pozanenko (IKI),  A. Novichonok (KIAM, PetrSU),  I. \nNikolenko (CrAO), A. Volnova (IKI), I. Molotov (KIAM) report on behalf \nof larger GRB follow-up collaboration:\n\nWe observed the field of  Swift GRB 180314B (D'Avanzo et al., GCN 22491) \nwith Zeiss-1000/Koshka (CrAO) telescope starting March 15 (UT) 01:55:39.\nWe obtained several  images in R-filter. We do not detect any source \nwithin enhanced Swift-XRT position (Beardmore et al., GCN 22494). \nPreliminary photometry of the field is following.\n\nDate        UT start  t-T0      Filter Exp.   OT    Err.  UL\n                       (mid, days)    (s)\n\n2018-03-15  01:55:39  0.15459    R     7*180  n/d   n/d   22.2\n\nThe photometry is based on nearby USNO-B1.0 stars\n\nUSNO-B1_id   R1\n1135-0426232 15.02\n1135-0426125 15.64\n1136-0433074 16.46",
  "circularId": 22497,
  "createdOn": 1521136117000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 180314B: Zeiss-1000/CrAO optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 180314B"
}