GCN Circular 28673
Subject
GRB 201015A: Assy and Mondy optical observations
Date
2020-10-17T15:56:12Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), V. Kim (AFIF, Pulkovo Observatory), A. Pozanenko (IKI),
E. Klunko (ISTP), M. Krugov (AFIF), N. Pankov (HSE), A. Volnova (IKI)
report on behalf of IKI GRB FuN:
We observed GRB 201015A (D'Elia et al., GCN 28632) with AZT-33IK
telescope of Mondy observatory in R-filter starting on Oct. 16 (UT)
13:42:54 and with AZT-20 telescope of Assy-Turgen observatory starting
on Oct. 16 (UT) 14:51:35 in g',r',i'-filters. 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; Izzo et al., GCN 28661) is detected in stacked images in each filter.
Preliminary photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err. UL (3sigma)
(mid, days) (s)
2020-10-16 13:42:54 0.64075 R 30*120 21.70 0.25 22.0
2020-10-16 14:51:35 0.68081 r'(AB) 36*60 21.85 0.14 23.5
2020-10-16 15:02:53 0.68796 g'(AB) 36*60 22.10 0.10 23.7
The photometry is based on the nearby stars of PanSTARRS-PS1 catalog.
RA, DEC, g, r, i
23:37:17.49934 +53:24:05.6357 18.6327 17.7832 17.4125
23:37:21.06032 +53:24:57.1308 19.4472 18.4947 18.0340