TITLE: GCN CIRCULAR NUMBER: 31208 SUBJECT: Fermi GRB 211211B: Global MASTER-Net observations report DATE: 21/12/11 23:15:09 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 GRB 211211B ( Fermi GBM team, GCN 31207) errorbox 48 sec after notice time and 56 sec after trigger time at 2021-12-11 21:49:39 UT, with upper limit up to 17.7 mag. The observations began at zenith distance = 78 deg. The sun altitude is -68.9 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 211211B errorbox 54 sec after notice time and 62 sec after trigger time at 2021-12-11 21:49:45 UT, with upper limit up to 18.0 mag. The observations began at zenith distance = 78 deg. The sun altitude is -67.9 deg. MASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 211211B errorbox 927 sec after notice time and 935 sec after trigger time at 2021-12-11 22:04:17 UT, with upper limit up to 15.4 mag. Observations started at twilight. The observations began at zenith distance = 31 deg. The sun altitude is -11.4 deg. The galactic latitude b = 55 deg., longitude l = 80 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1811001 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 62 | 2021-12-11 21:49:39 | MASTER-Tavrida | (15h 19m 29.04s , +54d 09m 36.8s) | C | 10 | 13.2 | 87 | 2021-12-11 21:49:39 | MASTER-Tavrida | (15h 19m 06.97s , +54d 08m 19.9s) | C | 60 | 14.1 | Coadd 68 | 2021-12-11 21:49:45 | MASTER-Kislovodsk | (15h 28m 31.52s , +53d 24m 51.8s) | C | 10 | 15.9 | 68 | 2021-12-11 21:49:45 | MASTER-Kislovodsk | (15h 21m 58.64s , +53d 50m 33.7s) | C | 10 | 16.1 | 88 | 2021-12-11 21:49:45 | MASTER-Kislovodsk | (15h 21m 58.63s , +53d 50m 33.7s) | C | 50 | 17.1 | Coadd 96 | 2021-12-11 21:50:08 | MASTER-Tavrida | (15h 19m 22.56s , +54d 08m 37.1s) | C | 20 | 13.8 | 102 | 2021-12-11 21:50:15 | MASTER-Kislovodsk | (15h 28m 31.16s , +53d 23m 30.2s) | C | 20 | 16.5 | 103 | 2021-12-11 21:50:15 | MASTER-Kislovodsk | (15h 21m 58.79s , +53d 49m 12.9s) | C | 20 | 16.5 | 135 | 2021-12-11 21:50:48 | MASTER-Tavrida | (15h 19m 29.05s , +54d 08m 39.9s) | C | 20 | 13.8 | 142 | 2021-12-11 21:50:55 | MASTER-Kislovodsk | (15h 28m 33.12s , +53d 24m 46.6s) | C | 20 | 16.4 | 142 | 2021-12-11 21:50:55 | MASTER-Kislovodsk | (15h 22m 00.64s , +53d 50m 30.5s) | C | 20 | 16.5 | 180 | 2021-12-11 21:51:27 | MASTER-Tavrida | (15h 19m 26.15s , +54d 10m 30.8s) | C | 30 | 14.5 | 187 | 2021-12-11 21:51:35 | MASTER-Kislovodsk | (15h 28m 27.33s , +53d 24m 12.0s) | C | 30 | 16.6 | 187 | 2021-12-11 21:51:35 | MASTER-Kislovodsk | (15h 21m 55.00s , +53d 49m 57.0s) | C | 30 | 16.8 | 232 | 2021-12-11 21:51:35 | MASTER-Kislovodsk | (15h 21m 55.00s , +53d 49m 57.0s) | C | 120 | 17.8 | Coadd 234 | 2021-12-11 21:52:16 | MASTER-Tavrida | (15h 19m 26.25s , +54d 08m 42.8s) | C | 40 | 14.8 | 294 | 2021-12-11 21:52:16 | MASTER-Tavrida | (15h 19m 26.24s , +54d 08m 42.8s) | C | 160 | 15.4 | Coadd 242 | 2021-12-11 21:52:24 | MASTER-Kislovodsk | (15h 28m 27.53s , +53d 25m 10.1s) | C | 40 | 16.7 | 242 | 2021-12-11 21:52:25 | MASTER-Kislovodsk | (15h 21m 55.10s , +53d 50m 56.4s) | C | 40 | 17.1 | 298 | 2021-12-11 21:53:15 | MASTER-Tavrida | (15h 19m 29.93s , +54d 10m 14.2s) | C | 50 | 15.1 | 307 | 2021-12-11 21:53:24 | MASTER-Kislovodsk | (15h 28m 33.19s , +53d 24m 10.4s) | C | 50 | 16.9 | 307 | 2021-12-11 21:53:24 | MASTER-Kislovodsk | (15h 22m 00.97s , +53d 49m 57.8s) | C | 50 | 17.4 | 377 | 2021-12-11 21:54:25 | MASTER-Tavrida | (15h 19m 22.55s , +54d 09m 34.8s) | C | 70 | 14.8 | 387 | 2021-12-11 21:54:34 | MASTER-Kislovodsk | (15h 28m 27.37s , +53d 23m 09.2s) | C | 70 | 17.1 | 387 | 2021-12-11 21:54:34 | MASTER-Kislovodsk | (15h 21m 55.37s , +53d 48m 57.6s) | C | 70 | 17.7 | 793 | 2021-12-11 22:01:26 | MASTER-Kislovodsk | (15h 03m 20.24s , +48d 17m 01.7s) | C | 60 | 17.5 | 793 | 2021-12-11 22:01:26 | MASTER-Kislovodsk | (14h 57m 35.40s , +48d 42m 39.2s) | C | 60 | 17.6 | 873 | 2021-12-11 22:02:45 | MASTER-Kislovodsk | (15h 15m 23.56s , +50d 11m 46.1s) | C | 60 | 17.6 | 873 | 2021-12-11 22:02:45 | MASTER-Kislovodsk | (15h 09m 24.59s , +50d 37m 27.7s) | C | 60 | 17.5 | 965 | 2021-12-11 22:04:17 | MASTER-Amur | (15h 11m 57.70s , +48d 34m 22.0s) | C | 60 | 15.0 | 1034 | 2021-12-11 22:05:26 | MASTER-Kislovodsk | (15h 39m 17.59s , +50d 09m 32.2s) | C | 60 | 17.4 | 1034 | 2021-12-11 22:05:26 | MASTER-Kislovodsk | (15h 32m 54.37s , +50d 35m 18.8s) | C | 60 | 17.5 | 1052 | 2021-12-11 22:05:44 | MASTER-Amur | (15h 01m 31.13s , +46d 39m 07.4s) | C | 60 | 15.4 | 1114 | 2021-12-11 22:06:46 | MASTER-Kislovodsk | (15h 04m 40.67s , +52d 04m 22.8s) | C | 60 | 17.9 | 1114 | 2021-12-11 22:06:46 | MASTER-Kislovodsk | (14h 57m 59.20s , +52d 29m 57.6s) | C | 60 | 17.9 | 1140 | 2021-12-11 22:07:13 | MASTER-Amur | (15h 23m 36.85s , +46d 38m 23.4s) | C | 60 | 15.1 | 1154 | 2021-12-11 22:07:26 | MASTER-Tavrida | (14h 36m 41.26s , +50d 57m 43.7s) | C | 60 | 13.7 | 1194 | 2021-12-11 22:08:06 | MASTER-Kislovodsk | (14h 53m 12.04s , +46d 24m 20.3s) | C | 60 | 17.6 | 1194 | 2021-12-11 22:08:06 | MASTER-Kislovodsk | (14h 47m 16.29s , +46d 49m 47.5s) | C | 60 | 17.5 | 1227 | 2021-12-11 22:08:39 | MASTER-Amur | (15h 14m 03.89s , +44d 44m 34.7s) | C | 60 | 15.2 | 1274 | 2021-12-11 22:09:26 | MASTER-Kislovodsk | (15h 29m 33.47s , +52d 04m 07.2s) | C | 60 | 17.5 | 1274 | 2021-12-11 22:09:26 | MASTER-Kislovodsk | (15h 22m 53.07s , +52d 29m 44.6s) | C | 60 | 17.3 | 1318 | 2021-12-11 22:10:10 | MASTER-Amur | (14h 52m 34.06s , +44d 45m 42.6s) | C | 60 | 15.1 | 1354 | 2021-12-11 22:10:46 | MASTER-Kislovodsk | (14h 40m 29.24s , +48d 18m 30.0s) | C | 60 | 17.8 | 1354 | 2021-12-11 22:10:46 | MASTER-Kislovodsk | (14h 34m 19.38s , +48d 43m 49.9s) | C | 60 | 17.6 | 1425 | 2021-12-11 22:11:57 | MASTER-Amur | (15h 35m 02.56s , +48d 32m 41.3s) | C | 60 | 14.5 | 1514 | 2021-12-11 22:13:26 | MASTER-Amur | (15h 06m 01.53s , +42d 52m 01.5s) | C | 60 | 14.6 | 1604 | 2021-12-11 22:14:56 | MASTER-Amur | (15h 35m 24.20s , +44d 45m 24.3s) | C | 60 | 14.2 | 1694 | 2021-12-11 22:16:26 | MASTER-Amur | (14h 45m 08.95s , +42d 51m 52.7s) | C | 60 | 14.4 | 1782 | 2021-12-11 22:17:55 | MASTER-Amur | (15h 26m 47.66s , +42d 51m 18.2s) | C | 60 | 13.9 | 1793 | 2021-12-11 22:18:06 | MASTER-Tavrida | (14h 49m 24.58s , +50d 58m 43.9s) | C | 60 | 14.4 | 1955 | 2021-12-11 22:20:48 | MASTER-Kislovodsk | (15h 03m 25.56s , +48d 18m 28.4s) | C | 60 | 17.5 | 1955 | 2021-12-11 22:20:48 | MASTER-Kislovodsk | (14h 57m 36.27s , +48d 43m 48.7s) | C | 60 | 17.6 | 2036 | 2021-12-11 22:22:08 | MASTER-Kislovodsk | (15h 15m 28.60s , +50d 10m 45.5s) | C | 60 | 17.7 | 2036 | 2021-12-11 22:22:08 | MASTER-Kislovodsk | (15h 09m 25.52s , +50d 36m 11.1s) | C | 60 | 17.5 | 2116 | 2021-12-11 22:23:28 | MASTER-Kislovodsk | (15h 39m 26.60s , +50d 11m 23.0s) | C | 60 | 17.4 | 2116 | 2021-12-11 22:23:28 | MASTER-Kislovodsk | (15h 33m 24.69s , +50d 37m 00.4s) | C | 60 | 17.3 | 2196 | 2021-12-11 22:24:48 | MASTER-Kislovodsk | (15h 04m 35.48s , +52d 05m 31.5s) | C | 60 | 17.8 | 2196 | 2021-12-11 22:24:48 | MASTER-Kislovodsk | (14h 58m 16.33s , +52d 30m 53.4s) | C | 60 | 17.9 | 2206 | 2021-12-11 22:24:58 | MASTER-Tavrida | (15h 17m 40.23s , +54d 45m 44.4s) | C | 60 | 13.2 | 2276 | 2021-12-11 22:26:09 | MASTER-Kislovodsk | (14h 53m 11.30s , +46d 24m 55.2s) | C | 60 | 17.5 | 2276 | 2021-12-11 22:26:09 | MASTER-Kislovodsk | (14h 47m 35.23s , +46d 50m 12.3s) | C | 60 | 17.5 | 2356 | 2021-12-11 22:27:29 | MASTER-Kislovodsk | (15h 29m 39.21s , +52d 05m 03.7s) | C | 60 | 17.4 | 2356 | 2021-12-11 22:27:29 | MASTER-Kislovodsk | (15h 23m 20.91s , +52d 30m 35.1s) | C | 60 | 17.2 | 2364 | 2021-12-11 22:27:36 | MASTER-Tavrida | (14h 36m 42.00s , +50d 57m 48.0s) | C | 60 | 14.5 | 2437 | 2021-12-11 22:28:49 | MASTER-Kislovodsk | (14h 40m 23.07s , +48d 17m 12.8s) | C | 60 | 17.7 | 2437 | 2021-12-11 22:28:49 | MASTER-Kislovodsk | (14h 34m 33.60s , +48d 42m 22.3s) | C | 60 | 17.7 | 2517 | 2021-12-11 22:30:09 | MASTER-Kislovodsk | (14h 39m 18.39s , +44d 54m 30.2s) | C | 60 | 17.5 | 2517 | 2021-12-11 22:30:09 | MASTER-Kislovodsk | (14h 44m 42.79s , +44d 29m 18.4s) | C | 60 | 17.5 | 2999 | 2021-12-11 22:38:11 | MASTER-Kislovodsk | (14h 57m 29.97s , +48d 43m 11.7s) | C | 60 | 17.7 | 2999 | 2021-12-11 22:38:11 | MASTER-Kislovodsk | (15h 03m 31.06s , +48d 18m 12.2s) | C | 60 | 17.9 | 3079 | 2021-12-11 22:39:31 | MASTER-Kislovodsk | (15h 09m 11.73s , +50d 35m 59.9s) | C | 60 | 17.6 | 3079 | 2021-12-11 22:39:31 | MASTER-Kislovodsk | (15h 15m 26.97s , +50d 10m 55.6s) | C | 60 | 17.9 | 3159 | 2021-12-11 22:40:51 | MASTER-Kislovodsk | (15h 33m 13.90s , +50d 35m 40.6s) | C | 60 | 17.5 | 3159 | 2021-12-11 22:40:51 | MASTER-Kislovodsk | (15h 39m 27.64s , +50d 10m 26.1s) | C | 60 | 17.6 | 3239 | 2021-12-11 22:42:11 | MASTER-Kislovodsk | (14h 58m 09.07s , +52d 32m 01.9s) | C | 60 | 17.2 | 3239 | 2021-12-11 22:42:11 | MASTER-Kislovodsk | (15h 04m 41.08s , +52d 07m 00.1s) | C | 60 | 17.5 | 3319 | 2021-12-11 22:43:31 | MASTER-Kislovodsk | (14h 47m 27.42s , +46d 48m 42.7s) | C | 60 | 17.6 | 3319 | 2021-12-11 22:43:31 | MASTER-Kislovodsk | (14h 53m 14.39s , +46d 23m 46.6s) | C | 60 | 17.8 | 3332 | 2021-12-11 22:43:44 | MASTER-Tavrida | (14h 36m 44.62s , +50d 58m 08.0s) | C | 60 | 12.9 | 3399 | 2021-12-11 22:44:52 | MASTER-Kislovodsk | (15h 23m 10.29s , +52d 31m 47.8s) | C | 60 | 17.1 | 3399 | 2021-12-11 22:44:52 | MASTER-Kislovodsk | (15h 29m 40.77s , +52d 06m 38.1s) | C | 60 | 17.6 | 3479 | 2021-12-11 22:46:12 | MASTER-Kislovodsk | (14h 34m 23.97s , +48d 43m 39.8s) | C | 60 | 17.4 | 3479 | 2021-12-11 22:46:12 | MASTER-Kislovodsk | (14h 40m 24.33s , +48d 18m 49.1s) | C | 60 | 17.6 | 3560 | 2021-12-11 22:47:32 | MASTER-Kislovodsk | (14h 39m 06.34s , +44d 56m 38.7s) | C | 60 | 17.6 | 3560 | 2021-12-11 22:47:32 | MASTER-Kislovodsk | (14h 44m 36.77s , +44d 31m 48.2s) | C | 60 | 18.0 | 3640 | 2021-12-11 22:48:52 | MASTER-Kislovodsk | (14h 33m 22.36s , +52d 31m 38.2s) | C | 60 | 17.8 | 3640 | 2021-12-11 22:48:52 | MASTER-Kislovodsk | (14h 39m 48.67s , +52d 06m 46.7s) | C | 60 | 18.0 | 3720 | 2021-12-11 22:50:12 | MASTER-Kislovodsk | (15h 39m 21.09s , +54d 23m 34.1s) | C | 60 | 17.4 | 3720 | 2021-12-11 22:50:13 | MASTER-Kislovodsk | (15h 46m 01.90s , +53d 58m 19.4s) | C | 60 | 17.8 | 3800 | 2021-12-11 22:51:33 | MASTER-Kislovodsk | (15h 07m 11.54s , +41d 06m 44.3s) | C | 60 | 17.1 | 3800 | 2021-12-11 22:51:33 | MASTER-Kislovodsk | (15h 12m 08.11s , +40d 41m 46.6s) | C | 60 | 16.8 | 3881 | 2021-12-11 22:52:53 | MASTER-Kislovodsk | (15h 03m 36.52s , +56d 19m 40.2s) | C | 60 | 17.5 | 3881 | 2021-12-11 22:52:53 | MASTER-Kislovodsk | (15h 10m 25.45s , +55d 54m 44.6s) | C | 60 | 17.7 | 3961 | 2021-12-11 22:54:13 | MASTER-Kislovodsk | (14h 25m 29.97s , +46d 49m 27.1s) | C | 60 | 17.5 | 3961 | 2021-12-11 22:54:13 | MASTER-Kislovodsk | (14h 31m 00.83s , +46d 24m 51.5s) | C | 60 | 17.8 | 4027 | 2021-12-11 22:55:19 | MASTER-Tavrida | (14h 49m 26.00s , +50d 57m 49.9s) | C | 60 | 13.3 | 4041 | 2021-12-11 22:55:33 | MASTER-Kislovodsk | (15h 54m 18.95s , +46d 49m 22.7s) | C | 60 | 16.7 | 4041 | 2021-12-11 22:55:33 | MASTER-Kislovodsk | (15h 59m 45.87s , +46d 24m 09.1s) | C | 60 | 16.5 | 4106 | 2021-12-11 22:56:38 | MASTER-Tavrida | (15h 03m 57.00s , +54d 43m 31.1s) | C | 60 | 13.9 | 4185 | 2021-12-11 22:57:58 | MASTER-Tavrida | (15h 17m 48.48s , +54d 43m 33.8s) | C | 60 | 14.1 | 4201 | 2021-12-11 22:58:13 | MASTER-Kislovodsk | (15h 30m 55.06s , +56d 19m 44.4s) | C | 60 | 17.6 | 4201 | 2021-12-11 22:58:13 | MASTER-Kislovodsk | (15h 37m 43.52s , +55d 54m 46.7s) | C | 60 | 18.0 | 4281 | 2021-12-11 22:59:34 | MASTER-Kislovodsk | (14h 47m 03.07s , +41d 07m 46.3s) | C | 60 | 17.6 | 4281 | 2021-12-11 22:59:34 | MASTER-Kislovodsk | (14h 52m 01.22s , +40d 43m 08.7s) | C | 60 | 17.8 | 4343 | 2021-12-11 23:00:36 | MASTER-Tavrida | (14h 25m 26.24s , +50d 58m 56.1s) | C | 60 | 17.0 | 4362 | 2021-12-11 23:00:54 | MASTER-Kislovodsk | (14h 32m 21.12s , +43d 01m 00.6s) | C | 60 | 17.7 | 4362 | 2021-12-11 23:00:54 | MASTER-Kislovodsk | (14h 37m 29.56s , +42d 36m 30.0s) | C | 60 | 18.0 | 4422 | 2021-12-11 23:01:55 | MASTER-Tavrida | (14h 37m 46.29s , +54d 45m 17.2s) | C | 60 | 17.6 | 4442 | 2021-12-11 23:02:14 | MASTER-Kislovodsk | (16h 06m 47.23s , +48d 41m 53.8s) | C | 60 | 17.1 | 4501 | 2021-12-11 23:03:14 | MASTER-Tavrida | (15h 39m 16.15s , +52d 51m 09.4s) | C | 60 | 13.0 | 4522 | 2021-12-11 23:03:34 | MASTER-Kislovodsk | (14h 39m 19.05s , +44d 56m 31.0s) | C | 60 | 17.6 | 4522 | 2021-12-11 23:03:34 | MASTER-Kislovodsk | (14h 44m 37.49s , +44d 31m 57.7s) | C | 60 | 18.0 | 4660 | 2021-12-11 23:05:52 | MASTER-Tavrida | (14h 51m 33.35s , +54d 43m 54.0s) | C | 60 | 17.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.