GCN Circular 28333
Subject
GRB 200829A: Koshka Zeiss-1000 optical observations
Event
Date
2020-08-31T19:52:13Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), S. Naroenkov (INASAN), A. Pozanenko (IKI), N. Pankov
(HSE), S. Belkin (IKI), E. Mazaeva (IKI) report on behalf of larger GRB
IKI FuN collaboration:
We observed the the field of GRB 200829A (Siegel et al., GCN 28307; Ursi
et al., GCN 28314; Ridnaia et al., GCN 28323; Lesage & Meegan, GCN
28326) with Zeiss-1000 1-m telescope of Koshka Observatory on August,
30 starting (UT) 19:18:21 in I- and R-filters. The optical afterglow
(Siegel et al., GCN 28307, Pozanenko et al., GCN 28308; Kuin & Siegel,
GCN 28311; Lipunov et al., GCN 28315; Vinko et al., GCN 28316; Hentunen
et al., GCN 28318; Moskvitin et al., GCNs 28322, 28328, Zhu et al., GCN
28324, GCN 28330; Pankov et al., GCN 28329; Izzo, GCN 28331) is
detected in stacked images of both filters. Preliminary photometry of
the afterglow is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2020-08-30 19:18:21 1.29067 I 47*120 20.14 0.20 20.8
2020-08-30 19:20:31 1.29217 R 47*120 21.0 0.25 21.4
The photometry is based on nearby USNO-B1.0 stars.