TITLE: GCN CIRCULAR NUMBER: 31103 SUBJECT: Fermi trigger No 659183098: Global MASTER-Net observations report DATE: 21/11/21 23:30:17 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB211121.43 (trigger No 659183098,06h 35m 57.60s , -29d 34m 12.0s, R=2) errorbox 32089 sec after notice time and 42677 sec after trigger time at 2021-11-21 22:16:10 UT, with upper limit up to 16.7 mag. The observations began at zenith distance = 77 deg. The sun altitude is -64.1 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB211121.43 errorbox 36199 sec after notice time and 46786 sec after trigger time at 2021-11-21 23:24:39 UT, with upper limit up to 17.1 mag. The observations began at zenith distance = 76 deg. The sun altitude is -51.5 deg. The galactic latitude b = -16 deg., longitude l = 239 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1792738 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 42707 | 2021-11-21 22:16:10 | MASTER-Tavrida | (06h 25m 04.65s , -28d 54m 36.6s) | C | 60 | 16.4 | 44973 | 2021-11-21 22:53:56 | MASTER-Tavrida | (06h 19m 54.04s , -29d 09m 06.9s) | C | 60 | 15.3 | 45052 | 2021-11-21 22:55:15 | MASTER-Tavrida | (06h 28m 56.40s , -29d 07m 55.7s) | C | 60 | 15.9 | 45602 | 2021-11-21 23:04:24 | MASTER-Tavrida | (06h 46m 20.11s , -29d 04m 14.3s) | C | 60 | 16.4 | 45681 | 2021-11-21 23:05:43 | MASTER-Tavrida | (06h 27m 20.98s , -31d 04m 40.6s) | C | 60 | 15.1 | 45760 | 2021-11-21 23:07:02 | MASTER-Tavrida | (06h 36m 39.91s , -31d 02m 12.1s) | C | 60 | 16.1 | 45838 | 2021-11-21 23:08:21 | MASTER-Tavrida | (06h 30m 20.16s , -27d 16m 37.3s) | C | 60 | 15.8 | 45917 | 2021-11-21 23:09:40 | MASTER-Tavrida | (06h 39m 12.92s , -27d 13m 26.7s) | C | 60 | 16.7 | 45997 | 2021-11-21 23:10:59 | MASTER-Tavrida | (06h 20m 15.49s , -29d 12m 58.4s) | C | 60 | 15.9 | 46076 | 2021-11-21 23:12:18 | MASTER-Tavrida | (06h 29m 13.40s , -29d 10m 02.0s) | C | 60 | 15.4 | 46313 | 2021-11-21 23:16:15 | MASTER-Tavrida | (06h 37m 26.79s , -29d 10m 42.7s) | C | 60 | 15.5 | 46616 | 2021-11-21 23:21:19 | MASTER-Tavrida | (06h 46m 29.92s , -29d 08m 35.6s) | C | 60 | 15.1 | 46695 | 2021-11-21 23:22:38 | MASTER-Tavrida | (06h 27m 45.52s , -31d 08m 22.6s) | C | 60 | 15.8 | 46774 | 2021-11-21 23:23:56 | MASTER-Tavrida | (06h 37m 01.56s , -31d 06m 16.6s) | C | 60 | 15.6 | 46817 | 2021-11-21 23:24:39 | MASTER-Kislovodsk | (06h 42m 02.87s , -33d 13m 07.3s) | C | 60 | 17.1 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.