{
  "bibcode": "2020GCN.28703....1B",
  "body": "S. Belkin (IKI), A. Pozanenko (IKI), V. Kim (AFIF, Pulkovo Observatory), \n   M. Krugov (AFIF), N. Pankov (HSE), A. Volnova (IKI) report on behalf \nof IKI GRB FuN:\n\nWe observed the filed of GRB 201020A  (Ambrosi   et al., GCN 28696) with \nAZT-20 telescope of Assy-Turgen observatory starting on (UT) Oct. 20 \n(Ut) 14:00:44 (UT)   in  r'-filter.  We clearly detect optical afterglow \n(Ambrosi   et al., GCN 28696;   Adachi et al., GCN 28697; Fu  et al., \nGCN 28701).\n\nPreliminary photometry of the afterglow is following\n\nDate       UT start  t-T0     Filter  Exp.    OT    Err.   UL (3sigma)\n                      (mid, days)        (s)\n\n2020-10-20 14:00:44  0.36688  r'(AB) 70*60    19.70 0.03   23.8\n\nThe photometry is based on the nearby stars of PanSTARRS-PS1 catalog.\nSDSS-DR12_id        r\nJ172452.73+312623.9 18.459\nJ172455.96+312344.8 18.057\nJ172452.57+312302.1 17.618\nJ172456.76+312315.5 16.876",
  "circularId": 28703,
  "createdOn": 1603216228000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 201020A: Assy optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 201020A"
}