TITLE:   GCN CIRCULAR
NUMBER:  32617
SUBJECT: GRB 220930A: AbAO Optical Upper Limit
DATE:    22/10/02 22:48:28 GMT
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).