{
  "bibcode": "2020GCN.28656....1B",
  "body": "S. Belkin (IKI),  N. Pankov (HSE), A. Pozanenko (IKI), V. Rumyantsev \n(CrAO),  A. Volnova (IKI)  report on behalf of larger GRB follow-up \ncollaboration:\n\nWe observed the GRB 201015A  (D'Elia et al., GCN 28632) with ZTSH 2.6m \ntelescope of CrAO observatory between Oct. 16 (UT) 01:02:14 -- 02:52:23. \n  The optical afterglow  (e.g., Lipunov et al., GCN 28633; Kennea et \nal., GCN 28635; Malesani et al., GCN 28637; Ackley et al., GCN 28639; Hu \net al., GCN 28645; Zhu et al., GCN 28653) at redshift z=0.426 (de Ugarte \nPostigo et al., GCN 28649) is clearly detected in each frame of 120 s \nexposure in R filter.\n\nThe exact photometry of the afterglow depends on the underlying object \nvisible and presented in PS1 catalogue (i'=19.6), which may be a host \ngalaxy (PS1 magnitude i'=19.6). Preliminary photometry of the afterglow \nin a combined image is following\n\nDate      UT start   t-T0    Filter Exp.     OT      err    UL(3sigma)\n                      (mid, days)       (s)\n\n\n2018-10-16 02:19:26  0.15501 R      12*120   20.66   0.05   23.0\n\n\nThe photometry is based on several nearby USNO-B1.0 stars\nUSNO-B1.0_id R2\n1434-0471702 17.51\n1434-0471746 18.23",
  "circularId": 28656,
  "createdOn": 1602862276000,
  "email": "apozanen@iki.rssi.ru",
  "subject": "GRB 201015A: CrAO/ZTSH optical observations",
  "submitter": "Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>",
  "eventId": "GRB 201015A"
}