{
  "bibcode": "2020GCN.28266....1B",
  "body": "S. Belkin (IKI), A. Kusakin (FAPHI),  A. Novichonok (KIAM), A. Pozanenko \n(IKI), I. Reva (FAPHI), E. Mazaeva (IKI),  A. Volnova (IKI) report on \nbehalf of larger GRB follow-up collaboration:\n\nWe observed the field of GRB 200819A (Dichiara  et al., GCN 28263) with \nZeiss-1000 telescope of Tien Shan Astronomical observatory starting on \nAugust 19 (UT) 18:03:47 and with RC-36 of Kitab observatory on (UT) \n16:30:50.   We do not detect any optical object within enhanced XRT \nposition (Evans et al., GCN 28265). Preliminary photometry of the field \nis following.\n\nDate        UT start t-T0     Filter Exp.    OT   Err.   UL  Telesope\n                      (mid, days)     (s)\n\n2020-08-19  16:30:50 0.05345   CR     3600  n/d  n/d    20.0 RC-36\n2020-08-19  18:03:47 0.10289   R      990   n/d  n/d    21.2 Zeiss-1000\n\n\nThe photometry is based on nearby USNO-B1.0 stars.\n\nRef.stars\nUSNO-B1.0_id R2\n1530-0056474 15.45\n1530-0056771 15.06",
  "circularId": 28266,
  "createdOn": 1597871091000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 200819A: Kitab, TSHAO optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 200819A"
}