GCN Circular 26872
Subject
GRB 200115A: Assy optical observations
Date
2020-01-24T17:57:09Z (4 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), V. Kim (AFIF), A. Pozanenko (IKI), M. Krugov (AFIF),
E. Mazaeva (IKI), S. Belkin (IKI) report on behalf of larger GRB IKI
FuN collaboration:
We observed the field of GRB 200115A (Cenko et al., GCN 26771) with
AZT-20 1.5 m telescope of Assy-Turgen observatory starting on Jan. 18
(UT) 16:55:27 in r'-filter. We do not detect the afterglow candidate
(GCNs 26790, 26818) up to r'=22.8 (AB) and hence we consider the object
found in BAT error circle (Cenko et al., GCN 26771) as the optical
afterglow of GRB 200215A.
Photometry of the field is following.
Date UT start t-T0 Filter Exp. OT UL (3sigma)
(mid, days) (s)
2019-10-18 16:55:27 3.22608 r' 13*180 n/d 22.8
The photometry is based on the nearby SDSS-DR12 stars.