GCN Circular 29191
Subject
GRB 201020B: Assy, Koshka, Mondy and Maidanak optical observations
Event
Date
2020-12-28T21:53:13Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), V. Kim (FAI, Pulkovo Observatory),
M. Krugov (FAI), A. Novichonok (Petrozavodsk State University, KIAM),
A. Zhornichenko (KIAM), E. Klunko (ISTP), O. Burhonov (UBAI), Sh.
Ehgamberdiev (UBAI) report on behalf of IKI GRB FuN:
We additionally observed the GRB 201020B (Fermi GBM team, GCN 28702;
Malacaria et al., GCN 28710; Arimoto et al., GCN 28716; Ursi et al., GCN
28714; Ridnaia et al., GCN 28723) with AZT-20 telescope of Assy
observatory, Zeiss-1000 of Koshka observatory, AZT-33IK telescope of
Sayan observatory (Mondy), and AZT-22 telescope of Maidanak observatory.
The optical afterglow (Lipunov et al., GCN 28718; Xu et al., GCN 28719;
Belkin et al., GCN 28725; Breeveld & Lien, GCN 28743; Vinko et al., GCN
28750; Kumar et al., GCN 28753; Belkin et al., GCN 28768; Vinko et al.,
GCN 28769; Vinko et al., GCN 28769; Panchal et al., GCN 28772; Nicastro
et al., GCN 28773; Kumar et al., GCN 28776; Kumar et al., GCN 28781)
with redshift of z= 0.804 (Kann et al., GCN 28765) is detected in most
of stacked images of our observations in R-filter.
Preliminary light curve of the afterglow based on our observations
including reported earlier (Belkin et al., GCNs 28725, 28768) can be
found in
http://grb.rssi.ru/GRB201020B/GRB201020B_R_LC.png
The photometry is based on the nearby USNO-B1.0 stars
USNO-B1.0_id R2
1670-0037414 16.74
1670-0037586 16.16