TITLE: GCN CIRCULAR NUMBER: 28602 SUBJECT: Fermi trigger No 624139481: Global MASTER-Net observations report DATE: 20/10/11 21:30:21 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 GRB201011.84 (trigger No 624139481,19h 22m 52.80s , -11d 27m 00.0s, R=9.59) errorbox 84 sec after notice time and 146 sec after trigger time at 2020-10-11 20:07:03 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 35 deg. The sun altitude is -20.5 deg. The galactic latitude b = -13 deg., longitude l = 27 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1459936 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 162 | 2020-10-11 20:07:03 | MASTER-IAC | (19h 10m 45.99s , -02d 24m 40.9s) | C | 30 | 17.1 | 207 | 2020-10-11 20:07:03 | MASTER-IAC | (19h 10m 45.99s , -02d 24m 40.8s) | C | 120 | 17.7 | Coadd 216 | 2020-10-11 20:07:52 | MASTER-IAC | (19h 10m 45.90s , -02d 26m 16.0s) | C | 40 | 17.3 | 281 | 2020-10-11 20:08:52 | MASTER-IAC | (19h 10m 48.37s , -02d 24m 53.5s) | C | 50 | 17.3 | 355 | 2020-10-11 20:10:01 | MASTER-IAC | (19h 10m 41.82s , -02d 25m 41.9s) | C | 60 | 17.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.