TITLE: GCN CIRCULAR NUMBER: 30805 SUBJECT: Fermi trigger No 653010039: Global MASTER-Net observations report DATE: 21/09/11 00:00:52 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 GRB210910.99 (trigger No 653010039,19h 31m 43.92s , +12d 52m 58.8s, R=28.47) errorbox 31 sec after notice time and 265 sec after trigger time at 2021-09-10 23:44:59 UT, with upper limit up to 17.6 mag. The observations began at zenith distance = 75 deg. The sun altitude is -30.5 deg. The galactic latitude b = -3 deg., longitude l = 49 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1716923 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 295 | 2021-09-10 23:44:59 | MASTER-Kislovodsk | (20h 30m 47.13s , +12d 34m 01.3s) | C | 60 | 17.1 | 295 | 2021-09-10 23:44:59 | MASTER-Kislovodsk | (20h 26m 57.68s , +12d 56m 23.9s) | C | 60 | 17.3 | 375 | 2021-09-10 23:46:19 | MASTER-Kislovodsk | (19h 57m 44.89s , +22d 02m 33.6s) | C | 60 | 16.8 | 375 | 2021-09-10 23:46:19 | MASTER-Kislovodsk | (19h 53m 42.81s , +22d 24m 51.3s) | C | 60 | 17.1 | 455 | 2021-09-10 23:47:39 | MASTER-Kislovodsk | (19h 45m 44.38s , +27d 45m 09.9s) | C | 60 | 16.4 | 455 | 2021-09-10 23:47:39 | MASTER-Kislovodsk | (19h 41m 29.70s , +28d 07m 27.0s) | C | 60 | 16.8 | 536 | 2021-09-10 23:49:00 | MASTER-Kislovodsk | (19h 26m 06.90s , +25d 49m 41.5s) | C | 60 | 16.9 | 536 | 2021-09-10 23:49:00 | MASTER-Kislovodsk | (19h 21m 59.39s , +26d 11m 49.2s) | C | 60 | 17.2 | 617 | 2021-09-10 23:50:21 | MASTER-Kislovodsk | (20h 30m 47.32s , +08d 44m 08.5s) | C | 60 | 16.9 | 618 | 2021-09-10 23:50:21 | MASTER-Kislovodsk | (20h 27m 02.69s , +09d 06m 22.2s) | C | 60 | 17.1 | 698 | 2021-09-10 23:51:42 | MASTER-Kislovodsk | (20h 40m 36.87s , +06d 50m 27.4s) | C | 60 | 17.4 | 698 | 2021-09-10 23:51:42 | MASTER-Kislovodsk | (20h 36m 53.21s , +07d 12m 42.3s) | C | 60 | 17.6 | 778 | 2021-09-10 23:53:02 | MASTER-Kislovodsk | (20h 24m 53.63s , +14d 27m 33.9s) | C | 60 | 17.0 | 778 | 2021-09-10 23:53:02 | MASTER-Kislovodsk | (20h 21m 03.00s , +14d 49m 49.0s) | C | 60 | 17.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.