TITLE:   GCN CIRCULAR
NUMBER:  28322
SUBJECT: GRB 200829A: SAO RAS optical observations
DATE:    20/08/30 13:45:46 GMT
FROM:    Moskvitin Alexander at SAO RAS  <mosk@sao.ru>

A. S. Moskvitin,  V. N. Aitov (SAO RAS)
on behalf of GRB follow-up team report.

We observed the field of the GRB 200829A (Siegel et al., GCN 28307)
with Zeiss-1000 (1-m telescope of SAO RAS) equipped with
Multi-Mode Photometer-Polarimeter (MMPP). We obtained 4 x 300 sec.
frames in Rc band and similar sequence in Ic band.

The OT (Siegel et al., GCN 28307; Pozanenko et al., GCN 28308;
Kuin and Siegel, GCN 28311; Lipunov et al., GCN 28315; Vinko et al.,
28316; Hentunen and Nissinen,  GCN 28318) is clearly detected
with the brightness R = 17.84 +/- 0.09 (T_mid - T0 = 4.587 h),
I = 17.65 +/- 0.09 (T_mid - T0 = 4.204 h).
Preliminary photometry is based on R2 and I magnitudes
of nearby USNO-B1 stars.