{
  "bibcode": "2020GCN.29032....1P",
  "body": "N. Pankov (HSE),  A. Zhornichenko (KIAM),   A. Pozanenko (IKI),  A. \nNovichonok (Petrozavodsk State University, KIAM), S. Belkin (IKI), \nreport  on behalf of IKI GRB FuN:\n\nWe observed the field of  GRB 201203A (Dichiara  et al., GCN 28985) with \nZeiss-1000 telescope of Koshka observatory starting on Dec. 03 (UT) \n20:50:46. We do not detect any optical source within XRT position \n(D'Elia  et al., GCN 28990) in agreement with previous observations \n(Jelinek et al., GCN 28986, Watson et al., GCN 28987, Zheng et al., \n28988, Niwano et al., GCN 28992, Kumar et al. GCN 28993; Kumar et al. \nGCN29030)\n\nPreliminary photometry of the field is following\n\nDate       UT start   t-T0       Filter Exp.    OT    Err.  UL(3sigma)\n                       (mid, days)        (s)\n\n2020-12-03 20:50:46   0.58216    R      120*25   n/d  n/d   20.5\n\n\nThe photometry is based on the nearby USNO-B1.0 stars\nUSNO-B1.0_id R2\nUSNO_B10_0634-0041449\nUSNO_B10_0634-0041608\nUSNO_B10_0634-0041460\nUSNO_B10_0635-0033957",
  "circularId": 29032,
  "createdOn": 1607811695000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 201203A: Zeiss-1000 (Koshka observatory) optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 201203A"
}