GCN Circular 28703
Subject
GRB 201020A: Assy optical observations
Event
Date
2020-10-20T17:50:28Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), V. Kim (AFIF, Pulkovo Observatory),
M. Krugov (AFIF), N. Pankov (HSE), A. Volnova (IKI) report on behalf
of IKI GRB FuN:
We observed the filed of GRB 201020A (Ambrosi et al., GCN 28696) with
AZT-20 telescope of Assy-Turgen observatory starting on (UT) Oct. 20
(Ut) 14:00:44 (UT) in r'-filter. We clearly detect optical afterglow
(Ambrosi et al., GCN 28696; Adachi et al., GCN 28697; Fu et al.,
GCN 28701).
Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err. UL (3sigma)
(mid, days) (s)
2020-10-20 14:00:44 0.36688 r'(AB) 70*60 19.70 0.03 23.8
The photometry is based on the nearby stars of PanSTARRS-PS1 catalog.
SDSS-DR12_id r
J172452.73+312623.9 18.459
J172455.96+312344.8 18.057
J172452.57+312302.1 17.618
J172456.76+312315.5 16.876