TITLE: GCN CIRCULAR NUMBER: 30814 SUBJECT: Fermi trigger No 653066130: Global MASTER-Net observations report DATE: 21/09/11 19:45:24 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> 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-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 GRB210911.64 (trigger No 653066130,19h 54m 14.40s , +27d 03m 36.0s, R=1) errorbox 9456 sec after notice time and 10747 sec after trigger time at 2021-09-11 18:14:32 UT, with upper limit up to 18.6 mag. The observations began at zenith distance = 18 deg. The sun altitude is -23.3 deg. The galactic latitude b = -1 deg., longitude l = 64 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1717622 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 10777 | 2021-09-11 18:14:32 | MASTER-Tavrida | (20h 01m 04.70s , +26d 07m 50.2s) | C | 60 | 18.3 | 11647 | 2021-09-11 18:29:02 | MASTER-Tavrida | (19h 52m 03.36s , +26d 05m 41.4s) | C | 60 | 18.5 | 11726 | 2021-09-11 18:30:21 | MASTER-Tavrida | (20h 00m 56.03s , +26d 07m 05.1s) | C | 60 | 18.6 | 11936 | 2021-09-11 18:33:51 | MASTER-Tavrida | (20h 04m 02.18s , +28d 01m 24.6s) | C | 60 | 18.2 | 12094 | 2021-09-11 18:36:29 | MASTER-Tavrida | (19h 46m 55.90s , +27d 59m 44.9s) | C | 60 | 17.4 | 12410 | 2021-09-11 18:41:45 | MASTER-Tavrida | (19h 51m 15.35s , +29d 54m 16.4s) | C | 60 | 17.4 | 12648 | 2021-09-11 18:45:43 | MASTER-Tavrida | (19h 51m 59.75s , +26d 05m 32.7s) | C | 60 | 18.5 | 12727 | 2021-09-11 18:47:02 | MASTER-Tavrida | (20h 00m 55.95s , +26d 06m 42.1s) | C | 60 | 18.6 | 12806 | 2021-09-11 18:48:21 | MASTER-Tavrida | (19h 54m 57.60s , +28d 00m 03.6s) | C | 60 | 17.7 | 12886 | 2021-09-11 18:49:41 | MASTER-Tavrida | (20h 03m 59.85s , +28d 01m 01.8s) | C | 60 | 18.2 | 13054 | 2021-09-11 18:52:28 | MASTER-Tavrida | (19h 46m 48.49s , +27d 58m 55.5s) | C | 60 | 17.2 | 13530 | 2021-09-11 19:00:25 | MASTER-Tavrida | (19h 51m 10.95s , +29d 52m 49.5s) | C | 60 | 17.2 | 13769 | 2021-09-11 19:04:24 | MASTER-Tavrida | (19h 55m 01.08s , +28d 00m 09.9s) | C | 60 | 17.5 | 13848 | 2021-09-11 19:05:43 | MASTER-Tavrida | (20h 03m 56.27s , +27d 59m 35.1s) | C | 60 | 18.1 | 14007 | 2021-09-11 19:08:22 | MASTER-Tavrida | (19h 46m 51.34s , +27d 59m 28.0s) | C | 60 | 17.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.