Аннотация:https://www.astronomerstelegram.org/?read=14796MASTER OT J205357.98-530820.3 discovery - bright optical counterpart detection with fast decay of Fermi trigger 647942198 / GRB 210714AMASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)located in Argentina (OAFA observatory of San Juan National University)started inspect of the Fermi GRB210714.33 (trigger No 647942198 https://gcn.gsfc.nasa.gov/other/647942198.fermi, 20h 46m 43.20s , -52d 12m 36.0s, R=1.38d) errorbox 150 sec after notice time and 181 sec after trigger time at 2021-07-14 07:59:34 UT, with upper limit up to 19.5 mag (Lipunov et al. , GCN #30461 , GCN #30466 , cover map by MASTER) . The observations began at zenith distance = 34 deg. The sun altitude is -44.8 deg.MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )discovered OT source at (RA, Dec) = 20h 53m 57.98s -53d 08m 20.3s on 2021-07-14.35751 UT with fast decay typical for GRB OT light curve.The OT magnitude (unfiltered)at 08:52:10UT(ttrigger=07:56:33) 16.1m (mlim=18.7).We have reference image on 2016-07-30.14890 UT with unfiltered 20.3m.Spectral observations of host galaxy (presents in VIZIER) are required.