TITLE: GCN CIRCULAR NUMBER: 28580 SUBJECT: Fermi trigger No 623873165: Global MASTER-Net observations report DATE: 20/10/08 18:15:19 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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB201008.75 (trigger No 623873165,06h 12m 38.40s , +38d 27m 00.0s, R=3.1) errorbox 92 sec after notice time and 181 sec after trigger time at 2020-10-08 18:09:02 UT, with upper limit up to 14.2 mag. The observations began at zenith distance = 43 deg. The sun altitude is -42.5 deg. The galactic latitude b = 10 deg., longitude l = 175 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1458233 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 201 | 2020-10-08 18:09:02 | MASTER-Tunka | (06h 11m 31.03s , +38d 12m 22.4s) | P| | 40 | 14.2 | The observation and reduction will continue. The message may be cited.