TITLE: GCN CIRCULAR NUMBER: 30802 SUBJECT: Fermi trigger No 652957973: Global MASTER-Net observations report DATE: 21/09/10 19:30:21 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 GRB210910.38 (trigger No 652957973,19h 58m 12.00s , +35d 33m 00.0s, R=8.86) errorbox 34681 sec after notice time and 34729 sec after trigger time at 2021-09-10 18:51:38 UT, with upper limit up to 19.2 mag. The observations began at zenith distance = 12 deg. The sun altitude is -33.2 deg. The galactic latitude b = 3 deg., longitude l = 72 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1716266 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 34760 | 2021-09-10 18:51:38 | MASTER-Kislovodsk | (20h 21m 50.58s , +33d 30m 20.3s) | C | 60 | 18.5 | 34760 | 2021-09-10 18:51:38 | MASTER-Kislovodsk | (20h 16m 27.89s , +33d 53m 42.0s) | C | 60 | 18.9 | 34840 | 2021-09-10 18:52:59 | MASTER-Kislovodsk | (20h 16m 44.97s , +39d 13m 54.2s) | C | 60 | 18.0 | 34840 | 2021-09-10 18:52:59 | MASTER-Kislovodsk | (20h 10m 55.05s , +39d 37m 17.3s) | C | 60 | 18.5 | 34920 | 2021-09-10 18:54:19 | MASTER-Kislovodsk | (20h 23m 28.65s , +37d 19m 10.2s) | C | 60 | 18.4 | 34920 | 2021-09-10 18:54:19 | MASTER-Kislovodsk | (20h 17m 47.95s , +37d 42m 26.7s) | C | 60 | 18.6 | 35000 | 2021-09-10 18:55:39 | MASTER-Kislovodsk | (19h 24m 23.96s , +43d 01m 49.5s) | C | 60 | 17.9 | 35080 | 2021-09-10 18:56:59 | MASTER-Kislovodsk | (20h 10m 55.05s , +41d 07m 08.3s) | C | 60 | 17.8 | 35080 | 2021-09-10 18:56:59 | MASTER-Kislovodsk | (20h 04m 54.00s , +41d 30m 24.6s) | C | 60 | 18.4 | 35240 | 2021-09-10 18:59:39 | MASTER-Kislovodsk | (20h 31m 22.55s , +35d 24m 35.7s) | C | 60 | 18.4 | 35240 | 2021-09-10 18:59:39 | MASTER-Kislovodsk | (20h 25m 51.15s , +35d 47m 58.7s) | C | 60 | 19.2 | 35933 | 2021-09-10 19:11:11 | MASTER-Kislovodsk | (20h 21m 46.95s , +33d 30m 05.8s) | C | 60 | 18.5 | 35933 | 2021-09-10 19:11:11 | MASTER-Kislovodsk | (20h 16m 24.61s , +33d 53m 23.0s) | C | 60 | 18.8 | 36013 | 2021-09-10 19:12:31 | MASTER-Kislovodsk | (20h 16m 43.83s , +39d 12m 08.3s) | C | 60 | 18.0 | 36013 | 2021-09-10 19:12:32 | MASTER-Kislovodsk | (20h 10m 54.49s , +39d 35m 25.4s) | C | 60 | 18.4 | 36093 | 2021-09-10 19:13:52 | MASTER-Kislovodsk | (20h 23m 30.45s , +37d 19m 53.5s) | C | 60 | 18.3 | 36093 | 2021-09-10 19:13:52 | MASTER-Kislovodsk | (20h 17m 50.20s , +37d 43m 05.2s) | C | 60 | 18.5 | 36174 | 2021-09-10 19:15:12 | MASTER-Kislovodsk | (19h 24m 26.45s , +43d 00m 02.1s) | C | 60 | 17.9 | 36253 | 2021-09-10 19:16:32 | MASTER-Kislovodsk | (20h 10m 52.66s , +41d 08m 02.4s) | C | 60 | 17.7 | 36253 | 2021-09-10 19:16:32 | MASTER-Kislovodsk | (20h 04m 52.35s , +41d 31m 14.2s) | C | 60 | 18.3 | 36414 | 2021-09-10 19:19:12 | MASTER-Kislovodsk | (20h 31m 15.62s , +35d 26m 06.5s) | C | 60 | 18.3 | 36414 | 2021-09-10 19:19:12 | MASTER-Kislovodsk | (20h 25m 44.80s , +35d 49m 24.6s) | C | 60 | 19.1 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.