{
  "bibcode": "2020GCN.27849....1B",
  "body": "S. Belkin (IKI), V. Kim (AFIF, Pulkovo Observatory), A. Pozanenko (IKI), \nM. Krugov (AFIF),  E. Mazaeva  (IKI),  A. Volnova (IKI)  report on \nbehalf of larger GRB IKI FuN collaboration:\n\nWe observed  GRB 200528A (Fermi GBM Team  GCN 27831;   Ambrosi  et al., \nGCN 27832) with AZT-20 1.5 m telescope  of Assy-Turgen observatory \nstarting on May., 28 (UT) 16:16:12.\nWe do not detect any sources in the Swift-XRT extended position (Evans \net al., GCN 27836).\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\n2020-05-28 16:16:12   0.26777    r(AB)  54*60  n/d  n/d    22.4\n\nThe photometry is based on the nearby stars of SDSS catalog\n\nSDSS-DR12_id        r\nJ114613.33+581329.5 19.455\nJ114632.90+581307.2 19.190\nJ114549.81+581044.3 19.004\nJ114600.53+580839.6 16.985",
  "circularId": 27849,
  "createdOn": 1590739745000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 200528A: Assy optical upper limit",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 200528A"
}