GCN Circular 28656
Subject
GRB 201015A: CrAO/ZTSH optical observations
Event
Date
2020-10-16T15:31:16Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), N. Pankov (HSE), A. Pozanenko (IKI), V. Rumyantsev
(CrAO), A. Volnova (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the GRB 201015A (D'Elia et al., GCN 28632) with ZTSH 2.6m
telescope of CrAO observatory between Oct. 16 (UT) 01:02:14 -- 02:52:23.
The optical afterglow (e.g., Lipunov et al., GCN 28633; Kennea et
al., GCN 28635; Malesani et al., GCN 28637; Ackley et al., GCN 28639; Hu
et al., GCN 28645; Zhu et al., GCN 28653) at redshift z=0.426 (de Ugarte
Postigo et al., GCN 28649) is clearly detected in each frame of 120 s
exposure in R filter.
The exact photometry of the afterglow depends on the underlying object
visible and presented in PS1 catalogue (i'=19.6), which may be a host
galaxy (PS1 magnitude i'=19.6). Preliminary photometry of the afterglow
in a combined image is following
Date UT start t-T0 Filter Exp. OT err UL(3sigma)
(mid, days) (s)
2018-10-16 02:19:26 0.15501 R 12*120 20.66 0.05 23.0
The photometry is based on several nearby USNO-B1.0 stars
USNO-B1.0_id R2
1434-0471702 17.51
1434-0471746 18.23