{
  "bibcode": "2022GCN.31567....1P",
  "body": "N. Pankov (HSE, IKI), A. Pozanenko (IKI), S. Belkin (IKI, HSE), O. \nBurhonov (UBAI),  Sh. Ehgamberdiev (UBAI) report on behalf of GRB IKI FuN:\n\nWe observed the filed of GRB 210919A detected by Swift (Tohuvavohu et \nal. GCN 30846) with AZT-22 1.5m telescope of Maidanak observatory on \nSep. 19, and 20, 2021. Within enhanced Swift-XRT position (Goad et al. \nGNC 30850) we do not detect the potential afterglow (Kann et al. GCN \n30883, 30884) in both epochs. In the deep observation on 2021-09-19 with \na mean seeing of 1\" we  marginally detected the host galaxy candidate \nreported by O'Connor et al. (GCN 30934) and Kann et al. (GCN 30983) at \nthe redshift of z=0.2411 (Rossi et al. GCN 31453). Using aperture \nphotometry we found R = 24.05 +/- 0.35 of the host galaxy candidate. We \ndo not detect the source at the eastern edge of the XRT error circle \nreported by  Kann et al. (GCN 30983).\n\nPreliminary photometry of the field in following\n\nDate       UT start  t-T0      Filter Exp.   OT  Err.  UL(3sigma)\n                      (mid, days)        (s)\n2021-09-19 22:27:50   0.94950    R    32*180 n/d n/d 24.2\n2021-09-20 23:04:55   1.95651    R    14*180 n/d n/d 22.9\n\nThe photometry is based on the nearby SDSS-DR12 stars, R magnitude \ncalculated by Lupton' transformations.",
  "circularId": 31567,
  "createdOn": 1644517126000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 210919A: Maidanak optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 210919A"
}