TITLE:   GCN CIRCULAR
NUMBER:  33628
SUBJECT: GRB 230414B: AbAO optical observations
DATE:    23/04/15 11:15:00 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

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

We observed  the field of Swift GRB 230414B (D'Ai et al., GCN 33612) 
with AS-32 telescope of Abastumani observatory (AbAO) in   R-filter 
starting on Apr. 14 (UT) 16:46:07. We  detected the  afterglow (Pankov 
et al., GCN 33615; Lu et al., GCN 33616; Raman et al., GCN 33618; Ghosh 
et al., GCN 33620; Moskvitin et al., GCN 33622; Malesani et al., GCN 
33623; Zhu  et al., GCN 33625).  Preliminary photometry of the object is 
following

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

2023-04-14 16:46:07   0.06094  R     112*60  19.73 0.05    22.3

The photometry is based on nearby USNO-B1.0 stars.