GCN Circular 32617
Subject
GRB 220930A: AbAO Optical Upper Limit
Event
Date
2022-10-02T22:48:28Z (3 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI), S. Belkin
(IKI, HSE), V. R. Ayvazian (AbAO), D. Datashvili (AbAO), G. V.
Kapanadze (AbAO) report on behalf of GRB IKI FuN:
We observed the field of GRB 220930A (Cenko et. al, GCN 32603) with
AS-32 telescope of Abastumani Observatory (AbAO). We do not detect any
objects within enhanced Swift-XRT error region (Evans et. al, GCN
32608). The 3-sigma upper limit is following:
Date, UT start, t-T0, Exp., Filter, OT, Err, UL(3 sigma)
(mid, days)
2022-09-30 22:09:17 0.48085 70*60 R n/d n/d 22.3
The photometry is based on nearby USNO-B1.0 stars
USNO_B10_id R2
1033-0057261 16.60
1033-0057239 17.39
The obtained result is consistent with non-detections reported earlier
(Watson et. al, GCN 32604; Hu et al, GCN 32606; Lipunov et al, GCN
32607; Belles and Cenko, GCN 32609; Strausbaugh and Cucchiara, GCN 32610).