TITLE:   GCN CIRCULAR
NUMBER:  32317
SUBJECT: GRB 220701A: AbAO optical upper limit
DATE:    22/07/02 14:30:24 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

S. Belkin (IKI), N. Pankov (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze 
(AbAO), V. R. Ayvazian (AbAO),  D. Datashvili (AbAO), G. V. Kapanadze 
(AbAO) report on behalf of GRB IKI FuN

We observed the field of GRB 220701A detected by Swift (Evans et al., 
GCN 32306;) with AS-32 telescope of Abastumani Observatory (AbAO) 
starting on 2022-07-01 (UT) 17:54:12. We do not detect any optical 
sources within enhanced XRT position (Evans et al., GCN 32308). This 
upper limit is consistent with earlier and later non detection 
(O'Connor  et al. GCN 32309; Oates  et al. GCN 32310; Hu et al. GCN 
32311; Strausbaugh et al. GCN 32313; Zheng et al. GCN 32315). 
Preliminary upper limit of a stacked image is following:

  Date,     UT start, t-T0,    Exp.,  Filter, OT,    Err,  UL(3 sigma)
                     (mid, days)

2022-07-01 17:54:12  0.55016  22*60  R      n/d    n/d    21.0

The photometry is based on nearby USNO-B1.0 stars, R2 magnitude
RA DEC R2
16:10:21.85344 +55:26:18.9924 15.49
16:10:42.83688 +55:25:01.9920 17.38
16:10:59.99544 +55:21:15.1020 16.08
16:10:33.30600 +55:17:14.3520 16.76