TITLE: GCN CIRCULAR NUMBER: 31059 SUBJECT: Fermi GRB 211109A: Global MASTER-Net observations report DATE: 21/11/09 01:30:11 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, 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 (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 211109A ( Fermi GBM team, GCN 31058) errorbox 2424 sec after notice time and 2450 sec after trigger time at 2021-11-09 01:20:34 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 75 deg. The sun altitude is -28.4 deg. The galactic latitude b = 4 deg., longitude l = 255 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1779459 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 2481 | 2021-11-09 01:20:34 | MASTER-Kislovodsk | (08h 15m 26.97s , -30d 56m 58.4s) | C | 60 | 16.8 | 2481 | 2021-11-09 01:20:34 | MASTER-Kislovodsk | (08h 20m 10.07s , -31d 21m 55.0s) | C | 60 | 17.6 | 2561 | 2021-11-09 01:21:55 | MASTER-Kislovodsk | (08h 23m 30.65s , -29d 02m 47.5s) | C | 60 | 16.9 | 2561 | 2021-11-09 01:21:55 | MASTER-Kislovodsk | (08h 28m 08.95s , -29d 27m 41.8s) | C | 60 | 17.7 | 2641 | 2021-11-09 01:23:15 | MASTER-Kislovodsk | (08h 07m 46.58s , -32d 49m 13.3s) | C | 60 | 16.6 | 2641 | 2021-11-09 01:23:15 | MASTER-Kislovodsk | (08h 12m 34.87s , -33d 14m 11.3s) | C | 60 | 17.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.