GCN Circular 30851
Subject
GRB 210919A: AbAO optical upper limit
Date
2021-09-19T09:24:53Z (3 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE, IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI), S.
Belkin (IKI), D. Datashvili (AbAO), V. R. Ayvazian (AbAO), G. V.
Kapanadze (AbAO) report on behalf of GRB IKI FuN:
We observed the field of Swift short GRB 210919A (Tohuvavohu et al. GCN
30846) with AS-32 telescope of Abastumani observatory (AbAO) in
R-filter starting on Sep., 19 (UT) 00:48:33. We do not detect any object
in the enhanced XRT position (Goad et al. GCN 30850). This is consistent
with optical observations (Tohuvavohu et al. GCN 30846; Lipunov et al.,
GCN 30847; Hu et al. GCN 30848; Strausbaugh et al. GCN 30849).
Preliminary photometry of the field is following
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2021-09-19 00:48:33 0.03194 R 52*60 n/d n/d 22.1
The photometry is based on the nearby SDSS stars:
SDSS-DR12 R(Lupton)
5:21:01.5917 +1:18:14.862 17.82
5:20:58.8314 +1:18:59.733 18.36