TITLE: GCN CIRCULAR NUMBER: 30739 SUBJECT: Integral GRB210829.14: Global MASTER-Net observations report DATE: 21/08/29 03:38:08 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) was pointed to the Integral GRB210829.14 (trigger No 9366,05h 43m 32.47s , +22d 39m 06.1s, R=0.0541667) errorbox 28 sec after notice time and 40 sec after trigger time at 2021-08-29 03:28:00 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 65 deg. The sun altitude is -20.2 deg. The galactic latitude b = -3 deg., longitude l = 185 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1703466 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 46 | MASTER-SAAO | P\ | 10 | 16.4 | 61 | MASTER-SAAO | P\ | 40 | 17.1 | Coadd 68 | MASTER-SAAO | P\ | 10 | 16.4 | 94 | MASTER-SAAO | P\ | 20 | 16.8 | 127 | MASTER-SAAO | P\ | 20 | 16.8 | 162 | MASTER-SAAO | P\ | 90 | 17.5 | Coadd 164 | MASTER-SAAO | P\ | 30 | 16.7 | 211 | MASTER-SAAO | P\ | 40 | 17.1 | 269 | MASTER-SAAO | P\ | 50 | 17.3 | 336 | MASTER-SAAO | P\ | 60 | 17.2 | The observation and reduction will continue. The message may be cited.