GRB200829A: optical afterglow detection

The optical afterglow of GRB 200829A (Siegel et al. GCN 28307) is detected with the 0.8m RC80 robotic telescope at Piszkesteto Station of Konkoly Observatory starting on Aug 29 19:22:00 UT, 19346 s after the Swift/BAT trigger. The afterglow is measured on stacked Sloan r'- and i'-band frames of 3x300 s exposure. Photometry, tied to nearby comparison stars with PS1 magnitudes, gives. r' = 18.45 +/- 0.09 and i' = 18.49 +/- 0.11 mag, in accord with previous optical detections (Pozanenko et al. GCN 28308; Kuin et al. GCN 28311; Ursi et al. GCN 28314; Lipunov et al. GCN 28315)..