[vsnet-grb-info 24426] GRB 191220A: AbAO optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26525
SUBJECT: GRB 191220A: AbAO optical observations
DATE:    19/12/20 23:38:38 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO), V.R. 
Ayvazian (AbAO),    G. V.  Kapanadze (AbAO),   E. Mazaeva (IKI), A. 
Volnova  (IKI),  I. Molotov (KIAM) report on behalf of  GRB IKI FuN:

We observed the field of GRB 191220A (Evans et al., GCN 26515; Laha et 
al., GCN 26516) with AS-32 (0.7m) telescope of Abastumani Observatory 
starting on Dec. 20 (UT) 14:40:39.  We do no detect any source within 
enhanced Swift-XRT position (Osborne et al., GCN 26522). In particular 
we do not detect the candidate in the OT (Moskvitin, GCN 26519). 
Preliminary photometry of the field is following.

Date       UT start  t-T0    Filter Exp.  OT    Err. UL
                     (mid, days)     (s)
2019-12-20 14:40:39  0.05037 R      23*60 n/d   n/d  19.8

The photometry is based on nearby USNO-B1.0 stars
UUSNO-B1.0_id R2
1166-0338499  14.74
1166-0338587  15.40
1166-0338614  15.08