{
  "bibcode": "2018GCN.22979....1R",
  "body": "I. Reva (FAPHI), A. Pozanenko (IKI), A. Volnova (IKI),  E. Mazaeva (IKI), \nA. Kusakin (FAPHI),  M. Krugov (FAPHI) report on behalf of larger GRB\nfollow-up collaboration:\n\nWe observed the field of GRB 180720B (Siegel  et al., GCN 22973)  with \nZeiss-1000 telescope of Tien Shan Astronomical Observatory starting on July \n20  (UT) 19:46:17. We obtained several images in R and B-filters.  The \noptical afterglow (Martone et al. GCN 22976;  Sasadaet al., GCN 22977)  is \nclearly detected in both filters.  Preliminary photometry  of the afterglow \nat  (UT, mid time) 19:59 is R =17.1 +/- 0.1. The photometry is based on \nnearby USNO-B1.0 (R2) stars.",
  "circularId": 22979,
  "createdOn": 1532122617000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 180720B : TSHAO optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 180720B"
}