TITLE: GCN CIRCULAR NUMBER: 28821 SUBJECT: Fermi GRB 201103A: Global MASTER-Net observations report DATE: 20/11/03 06:30:15 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs 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-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 201103A ( Fermi GBM team, GCN 28820) errorbox 284 sec after notice time and 343 sec after trigger time at 2020-11-03 06:18:53 UT, with upper limit up to 16.7 mag. Observations started at twilight. The observations began at zenith distance = 73 deg. The sun altitude is -13.0 deg. The galactic latitude b = 36 deg., longitude l = 103 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1474580 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 374 | 2020-11-03 06:18:53 | MASTER-IAC | (16h 09m 29.35s , +70d 02m 37.3s) | C | 60 | 16.6 | 453 | 2020-11-03 06:20:13 | MASTER-IAC | (15h 22m 24.94s , +70d 04m 21.2s) | C | 60 | 16.7 | 533 | 2020-11-03 06:21:32 | MASTER-IAC | (16h 12m 13.39s , +66d 00m 40.5s) | C | 60 | 16.5 | 612 | 2020-11-03 06:22:52 | MASTER-IAC | (15h 27m 31.40s , +68d 03m 55.2s) | C | 60 | 16.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.