TITLE: GCN CIRCULAR NUMBER: 30828 SUBJECT: Fermi trigger No 653151835: Global MASTER-Net observations report DATE: 21/09/12 17:30:33 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-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 GRB210912.63 (trigger No 653151835,18h 48m 16.80s , +38d 23m 24.0s, R=11.54) errorbox 6050 sec after notice time and 6087 sec after trigger time at 2021-09-12 16:45:17 UT, with upper limit up to 17.8 mag. Observations started at twilight. The observations began at zenith distance = 6 deg. The sun altitude is -14.8 deg. The galactic latitude b = 17 deg., longitude l = 68 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1718727 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 6117 | 2021-09-12 16:45:17 | MASTER-Kislovodsk | (18h 48m 02.06s , +37d 18m 46.9s) | C | 60 | 17.7 | 6117 | 2021-09-12 16:45:17 | MASTER-Kislovodsk | (18h 42m 19.28s , +37d 41m 53.1s) | C | 60 | 17.7 | 6197 | 2021-09-12 16:46:37 | MASTER-Kislovodsk | (18h 38m 44.51s , +39d 14m 11.3s) | C | 60 | 17.8 | 6197 | 2021-09-12 16:46:37 | MASTER-Kislovodsk | (18h 32m 52.00s , +39d 37m 25.1s) | C | 60 | 17.7 | 6448 | 2021-09-12 16:50:48 | MASTER-Kislovodsk | (18h 58m 21.42s , +39d 13m 38.8s) | C | 60 | 16.1 | 6448 | 2021-09-12 16:50:48 | MASTER-Kislovodsk | (18h 52m 28.93s , +39d 37m 07.7s) | C | 60 | 15.9 | 6528 | 2021-09-12 16:52:08 | MASTER-Kislovodsk | (18h 39m 26.80s , +35d 24m 32.5s) | C | 60 | 17.2 | 6528 | 2021-09-12 16:52:08 | MASTER-Kislovodsk | (18h 33m 53.53s , +35d 47m 47.3s) | C | 60 | 17.5 | 6609 | 2021-09-12 16:53:29 | MASTER-Kislovodsk | (18h 28m 57.88s , +37d 18m 58.7s) | C | 60 | 16.4 | 6609 | 2021-09-12 16:53:29 | MASTER-Kislovodsk | (18h 23m 15.94s , +37d 42m 16.8s) | C | 60 | 16.4 | 6689 | 2021-09-12 16:54:49 | MASTER-Kislovodsk | (18h 50m 14.79s , +41d 08m 17.2s) | C | 60 | 16.4 | 6689 | 2021-09-12 16:54:49 | MASTER-Kislovodsk | (18h 44m 11.87s , +41d 31m 51.2s) | C | 60 | 16.4 | 6769 | 2021-09-12 16:56:09 | MASTER-Kislovodsk | (18h 32m 31.89s , +33d 30m 30.3s) | C | 60 | 16.0 | 6769 | 2021-09-12 16:56:09 | MASTER-Kislovodsk | (18h 27m 07.14s , +33d 53m 32.9s) | C | 60 | 16.0 | 6849 | 2021-09-12 16:57:30 | MASTER-Kislovodsk | (19h 10m 29.99s , +41d 08m 24.0s) | C | 60 | 15.8 | 6849 | 2021-09-12 16:57:30 | MASTER-Kislovodsk | (19h 04m 26.77s , +41d 31m 58.8s) | C | 60 | 15.9 | 6929 | 2021-09-12 16:58:50 | MASTER-Kislovodsk | (18h 50m 43.27s , +33d 31m 30.1s) | C | 60 | 15.0 | 6929 | 2021-09-12 16:58:50 | MASTER-Kislovodsk | (18h 45m 18.04s , +33d 54m 28.5s) | C | 60 | 15.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.