TITLE: GCN CIRCULAR NUMBER: 30792 SUBJECT: Fermi trigger No 652927551: Global MASTER-Net observations report DATE: 21/09/10 01:30:33 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 GRB210910.03 (trigger No 652927551,20h 06m 48.00s , +17d 45m 36.0s, R=1) errorbox 68 sec after trigger time at 2021-09-10 00:46:55 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 86 deg. The sun altitude is -21.1 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB210910.03 errorbox 126 sec after trigger time at 2021-09-10 00:47:53 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 52 deg. The sun altitude is -31.5 deg. The galactic latitude b = -8 deg., longitude l = 58 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1715785 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 73 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 06m 54.92s , +17d 43m 28.7s) | P- | 10 | 14.6 | 73 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 07m 21.30s , +18d 07m 03.2s) | P| | 10 | 14.7 | 93 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 07m 21.25s , +18d 07m 02.6s) | P| | 50 | 15.5 | Coadd 293 | 2021-09-10 00:46:55 | MASTER-Kislovodsk | (20h 07m 21.30s , +18d 07m 03.2s) | P| | 450 | 15.8 | Coadd 108 | 2021-09-10 00:47:25 | MASTER-Kislovodsk | (20h 06m 59.57s , +17d 42m 25.4s) | P- | 20 | 15.2 | 133 | 2021-09-10 00:47:25 | MASTER-Kislovodsk | (20h 06m 59.60s , +17d 42m 25.9s) | P- | 70 | 15.5 | Coadd 108 | 2021-09-10 00:47:25 | MASTER-Kislovodsk | (20h 07m 26.03s , +18d 06m 00.4s) | P| | 20 | 15.3 | 136 | 2021-09-10 00:47:53 | MASTER-OAFA | (20h 04m 21.05s , +20d 34m 02.9s) | C | 20 | 17.0 | 149 | 2021-09-10 00:48:05 | MASTER-Kislovodsk | (20h 06m 53.73s , +17d 41m 22.6s) | P- | 20 | 15.2 | 149 | 2021-09-10 00:48:05 | MASTER-Kislovodsk | (20h 07m 20.50s , +18d 04m 59.7s) | P| | 20 | 15.1 | 181 | 2021-09-10 00:48:32 | MASTER-OAFA | (20h 04m 24.67s , +20d 35m 55.0s) | C | 30 | 17.2 | 194 | 2021-09-10 00:48:45 | MASTER-Kislovodsk | (20h 07m 00.45s , +17d 41m 24.0s) | P- | 30 | 15.1 | 194 | 2021-09-10 00:48:45 | MASTER-Kislovodsk | (20h 07m 27.28s , +18d 04m 59.6s) | P| | 30 | 15.4 | 244 | 2021-09-10 00:48:45 | MASTER-Kislovodsk | (20h 07m 27.22s , +18d 04m 58.9s) | P| | 130 | 15.9 | Coadd 235 | 2021-09-10 00:49:22 | MASTER-OAFA | (20h 04m 18.22s , +20d 34m 59.7s) | C | 40 | 17.4 | 249 | 2021-09-10 00:49:35 | MASTER-Kislovodsk | (20h 06m 57.46s , +17d 43m 11.7s) | P- | 40 | 15.3 | 249 | 2021-09-10 00:49:35 | MASTER-Kislovodsk | (20h 07m 24.40s , +18d 06m 47.7s) | P| | 40 | 15.5 | 299 | 2021-09-10 00:50:21 | MASTER-OAFA | (20h 04m 17.89s , +20d 35m 58.7s) | C | 50 | 17.5 | 319 | 2021-09-10 00:50:36 | MASTER-Kislovodsk | (20h 06m 57.28s , +17d 41m 14.5s) | P- | 60 | 15.3 | 319 | 2021-09-10 00:50:36 | MASTER-Kislovodsk | (20h 07m 24.58s , +18d 04m 53.6s) | P| | 60 | 15.8 | 374 | 2021-09-10 00:51:30 | MASTER-OAFA | (20h 04m 24.38s , +20d 34m 58.4s) | C | 60 | 17.5 | 404 | 2021-09-10 00:51:56 | MASTER-Kislovodsk | (20h 07m 00.21s , +17d 42m 39.0s) | P- | 70 | 15.3 | 404 | 2021-09-10 00:51:56 | MASTER-Kislovodsk | (20h 07m 27.68s , +18d 06m 19.8s) | P| | 70 | 15.6 | 504 | 2021-09-10 00:51:56 | MASTER-Kislovodsk | (20h 07m 27.67s , +18d 06m 19.6s) | P| | 270 | 15.8 | Coadd 505 | 2021-09-10 00:53:26 | MASTER-Kislovodsk | (20h 06m 53.29s , +17d 41m 58.8s) | P- | 90 | 15.4 | 505 | 2021-09-10 00:53:26 | MASTER-Kislovodsk | (20h 07m 21.05s , +18d 05m 42.3s) | P| | 90 | 15.6 | 625 | 2021-09-10 00:55:16 | MASTER-Kislovodsk | (20h 06m 53.09s , +17d 42m 52.5s) | P- | 110 | 15.4 | 625 | 2021-09-10 00:55:16 | MASTER-Kislovodsk | (20h 07m 21.34s , +18d 06m 40.4s) | P| | 110 | 15.7 | 672 | 2021-09-10 00:55:59 | MASTER-OAFA | (20h 05m 07.45s , +16d 59m 57.7s) | C | 120 | 18.1 | 770 | 2021-09-10 00:57:27 | MASTER-Kislovodsk | (20h 06m 58.90s , +17d 41m 51.1s) | P- | 140 | 15.3 | 770 | 2021-09-10 00:57:27 | MASTER-Kislovodsk | (20h 07m 27.73s , +18d 05m 44.2s) | P| | 140 | 15.4 | 821 | 2021-09-10 00:58:18 | MASTER-OAFA | (20h 05m 11.45s , +17d 01m 07.4s) | C | 140 | 18.1 | 946 | 2021-09-10 01:00:07 | MASTER-Kislovodsk | (20h 06m 53.13s , +17d 40m 45.5s) | P- | 170 | 15.1 | 946 | 2021-09-10 01:00:07 | MASTER-Kislovodsk | (20h 07m 23.38s , +18d 04m 54.3s) | P| | 170 | 14.9 | 1001 | 2021-09-10 01:00:57 | MASTER-OAFA | (20h 05m 03.89s , +17d 00m 35.9s) | C | 180 | 18.2 | 1141 | 2021-09-10 01:03:17 | MASTER-Kislovodsk | (20h 06m 59.88s , +17d 41m 07.3s) | P- | 180 | 14.9 | 1200 | 2021-09-10 01:04:16 | MASTER-OAFA | (20h 05m 03.93s , +17d 01m 35.1s) | C | 180 | 18.2 | 1341 | 2021-09-10 01:06:38 | MASTER-Kislovodsk | (20h 06m 56.71s , +17d 42m 22.7s) | P- | 180 | 14.2 | 1400 | 2021-09-10 01:07:36 | MASTER-OAFA | (20h 05m 09.73s , +17d 00m 34.7s) | C | 180 | 18.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.