GCN Circular 28852
Subject
GRB 201104B: TSHAO optical observation
Date
2020-11-06T11:11:37Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), N. Pankov (HSE), I. Reva (FAPHI), A. Pozanenko (IKI)
report on behalf of GRB-IKI-FuN:
We observed the field of GRB 201104B (Sbarufatti et al., GCN 28825)
with Zeiss-1000 1-m telescope of Tien Shan Astronomical Observatory
starting on Nov. 05 (UT) 12:51:33.
The optical afterglow (Marshall et al., GCN 28827; Vielfaure et al.,
GCN 28840; Oates et al., GCN 28851) at redshift z = 1.954 (Vielfaure
et al., GCN 28840) is detected in stacked image in R-filter. Preliminary
photometry of the afterglow is following.
Date UT start t-T0 Filter Exp. OT Err. UL(3 sigma)
(mid, days) (s)
2020-11-05 12:51:33 0.82641 R 43*90 21.20 0.1 22.2
The photometry is based on nearby USNO-B1.0 stars.
USNO-B1.0_id R2
0979-0003163 17.51
0979-0003223 17.47
We note the presence of a galaxy 3.6" South-East from the afterglow. The
galaxy is clearly visible in Pan-STARRS and SDSS and detected in
USNO-B1.0, PS1 and SDSS DR12 (J002051.50+075026.5).