TITLE: GCN CIRCULAR NUMBER: 30521 SUBJECT: Fermi trigger No 648959581: Global MASTER-Net observations report DATE: 21/07/26 19:15:34 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB210726.11 (trigger No 648959581,11h 34m 52.80s , -18d 19m 12.0s, R=7.27) errorbox 45460 sec after notice time and 53674 sec after trigger time at 2021-07-26 17:27:31 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 50 deg. The sun altitude is -18.8 deg. The galactic latitude b = 41 deg., longitude l = 279 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1670575 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 53705 | 2021-07-26 17:27:31 | MASTER-SAAO | (11h 29m 45.94s , -19d 35m 04.5s) | C | 60 | 19.0 | 53784 | 2021-07-26 17:28:51 | MASTER-SAAO | (11h 38m 21.17s , -19d 34m 52.7s) | C | 60 | 19.0 | 53864 | 2021-07-26 17:30:10 | MASTER-SAAO | (11h 38m 03.06s , -17d 40m 59.7s) | C | 60 | 18.9 | 53944 | 2021-07-26 17:31:30 | MASTER-SAAO | (11h 46m 31.63s , -17d 39m 42.4s) | C | 60 | 18.8 | 54024 | 2021-07-26 17:32:50 | MASTER-SAAO | (11h 21m 59.37s , -17d 38m 40.1s) | C | 60 | 18.1 | 54103 | 2021-07-26 17:34:10 | MASTER-SAAO | (11h 30m 30.37s , -17d 39m 52.0s) | C | 60 | 18.9 | 54183 | 2021-07-26 17:35:29 | MASTER-SAAO | (11h 31m 05.39s , -15d 46m 24.5s) | C | 60 | 18.9 | 54263 | 2021-07-26 17:36:49 | MASTER-SAAO | (11h 39m 22.93s , -15d 45m 03.9s) | C | 60 | 18.9 | 54342 | 2021-07-26 17:38:09 | MASTER-SAAO | (11h 22m 07.79s , -21d 26m 33.0s) | C | 60 | 19.0 | 54422 | 2021-07-26 17:39:28 | MASTER-SAAO | (11h 30m 39.70s , -21d 27m 42.5s) | C | 60 | 19.0 | 54502 | 2021-07-26 17:40:48 | MASTER-SAAO | (11h 25m 00.51s , -13d 51m 26.0s) | C | 60 | 18.8 | 54786 | 2021-07-26 17:45:32 | MASTER-SAAO | (11h 33m 14.98s , -13d 52m 12.6s) | C | 60 | 18.7 | 54866 | 2021-07-26 17:46:52 | MASTER-SAAO | (11h 29m 45.46s , -19d 32m 37.2s) | C | 60 | 19.0 | 54945 | 2021-07-26 17:48:12 | MASTER-SAAO | (11h 38m 15.49s , -19d 34m 08.3s) | C | 60 | 19.0 | 55025 | 2021-07-26 17:49:31 | MASTER-SAAO | (11h 38m 02.59s , -17d 38m 39.0s) | C | 60 | 18.9 | 55105 | 2021-07-26 17:50:51 | MASTER-SAAO | (11h 46m 20.95s , -17d 39m 47.2s) | C | 60 | 18.8 | 55184 | 2021-07-26 17:52:11 | MASTER-SAAO | (11h 21m 59.03s , -17d 37m 58.3s) | C | 60 | 17.7 | 55264 | 2021-07-26 17:53:30 | MASTER-SAAO | (11h 30m 28.03s , -17d 39m 10.7s) | C | 60 | 18.8 | 55344 | 2021-07-26 17:54:50 | MASTER-SAAO | (11h 30m 58.38s , -15d 46m 07.5s) | C | 60 | 18.8 | 55423 | 2021-07-26 17:56:10 | MASTER-SAAO | (11h 39m 23.10s , -15d 46m 19.9s) | C | 60 | 18.8 | 55503 | 2021-07-26 17:57:29 | MASTER-SAAO | (11h 22m 04.52s , -21d 26m 08.1s) | C | 60 | 18.5 | 55582 | 2021-07-26 17:58:49 | MASTER-SAAO | (11h 30m 40.41s , -21d 27m 38.4s) | C | 60 | 19.0 | 55666 | 2021-07-26 18:00:12 | MASTER-SAAO | (11h 24m 59.92s , -13d 50m 10.1s) | C | 60 | 18.8 | 55951 | 2021-07-26 18:04:57 | MASTER-SAAO | (11h 33m 09.43s , -13d 49m 48.4s) | C | 60 | 18.8 | 56030 | 2021-07-26 18:06:17 | MASTER-SAAO | (11h 29m 48.56s , -19d 32m 43.3s) | C | 60 | 19.0 | 56110 | 2021-07-26 18:07:36 | MASTER-SAAO | (11h 38m 11.44s , -19d 33m 56.1s) | C | 60 | 19.1 | 56190 | 2021-07-26 18:08:56 | MASTER-SAAO | (11h 38m 01.86s , -17d 39m 39.9s) | C | 60 | 18.9 | 56269 | 2021-07-26 18:10:16 | MASTER-SAAO | (11h 46m 23.10s , -17d 38m 26.0s) | C | 60 | 18.8 | 56350 | 2021-07-26 18:11:36 | MASTER-SAAO | (11h 22m 03.47s , -17d 38m 49.5s) | C | 60 | 18.5 | 56430 | 2021-07-26 18:12:56 | MASTER-SAAO | (11h 30m 28.39s , -17d 37m 45.6s) | C | 60 | 18.7 | 56509 | 2021-07-26 18:14:15 | MASTER-SAAO | (11h 30m 58.36s , -15d 44m 26.7s) | C | 60 | 18.7 | 56589 | 2021-07-26 18:15:35 | MASTER-SAAO | (11h 39m 17.37s , -15d 43m 38.7s) | C | 60 | 18.6 | 56668 | 2021-07-26 18:16:55 | MASTER-SAAO | (11h 22m 08.90s , -21d 26m 10.3s) | C | 60 | 18.7 | 56748 | 2021-07-26 18:18:15 | MASTER-SAAO | (11h 30m 37.92s , -21d 27m 21.6s) | C | 60 | 18.7 | 56828 | 2021-07-26 18:19:34 | MASTER-SAAO | (11h 25m 03.29s , -13d 50m 46.3s) | C | 60 | 18.2 | 56908 | 2021-07-26 18:20:54 | MASTER-SAAO | (11h 33m 14.11s , -13d 49m 15.8s) | C | 60 | 18.1 | 56987 | 2021-07-26 18:22:14 | MASTER-SAAO | (11h 40m 39.80s , -13d 49m 44.1s) | C | 60 | 18.3 | 57067 | 2021-07-26 18:23:33 | MASTER-SAAO | (11h 48m 48.60s , -13d 50m 39.2s) | C | 60 | 18.4 | 57146 | 2021-07-26 18:24:53 | MASTER-SAAO | (11h 15m 24.29s , -15d 43m 38.8s) | C | 60 | 17.1 | 57226 | 2021-07-26 18:26:12 | MASTER-SAAO | (11h 23m 34.82s , -15d 44m 48.9s) | C | 60 | 17.8 | 57306 | 2021-07-26 18:27:32 | MASTER-SAAO | (11h 38m 24.88s , -21d 25m 34.7s) | C | 60 | 18.6 | 57385 | 2021-07-26 18:28:51 | MASTER-SAAO | (11h 47m 00.29s , -21d 26m 59.2s) | C | 60 | 18.5 | 57465 | 2021-07-26 18:30:11 | MASTER-SAAO | (11h 46m 46.69s , -15d 44m 22.0s) | C | 60 | 18.3 | 57545 | 2021-07-26 18:31:31 | MASTER-SAAO | (11h 55m 05.32s , -15d 43m 35.6s) | C | 60 | 18.5 | 57624 | 2021-07-26 18:32:51 | MASTER-SAAO | (11h 45m 49.75s , -19d 33m 17.8s) | C | 60 | 18.6 | 57704 | 2021-07-26 18:34:10 | MASTER-SAAO | (11h 54m 24.75s , -19d 33m 09.4s) | C | 60 | 18.6 | 57784 | 2021-07-26 18:35:30 | MASTER-SAAO | (11h 35m 23.27s , -11d 56m 44.5s) | C | 60 | 17.7 | 57863 | 2021-07-26 18:36:49 | MASTER-SAAO | (11h 43m 34.02s , -11d 55m 19.5s) | C | 60 | 17.8 | 57943 | 2021-07-26 18:38:09 | MASTER-SAAO | (11h 40m 38.96s , -13d 49m 53.3s) | C | 60 | 17.7 | 58022 | 2021-07-26 18:39:29 | MASTER-SAAO | (11h 48m 51.00s , -13d 49m 05.5s) | C | 60 | 17.8 | 58105 | 2021-07-26 18:40:52 | MASTER-SAAO | (11h 15m 32.15s , -15d 43m 07.9s) | C | 60 | 16.6 | 58185 | 2021-07-26 18:42:11 | MASTER-SAAO | (11h 23m 40.70s , -15d 44m 17.0s) | C | 60 | 17.3 | 58265 | 2021-07-26 18:43:31 | MASTER-SAAO | (11h 38m 30.15s , -21d 26m 40.5s) | C | 60 | 18.2 | 58344 | 2021-07-26 18:44:51 | MASTER-SAAO | (11h 47m 01.53s , -21d 25m 17.3s) | C | 60 | 18.2 | 58424 | 2021-07-26 18:46:10 | MASTER-SAAO | (11h 46m 53.63s , -15d 44m 24.8s) | C | 60 | 17.7 | 58504 | 2021-07-26 18:47:30 | MASTER-SAAO | (11h 55m 14.51s , -15d 43m 11.5s) | C | 60 | 17.9 | 58583 | 2021-07-26 18:48:50 | MASTER-SAAO | (11h 45m 52.24s , -19d 31m 45.5s) | C | 60 | 18.2 | 58663 | 2021-07-26 18:50:09 | MASTER-SAAO | (11h 54m 20.95s , -19d 30m 58.4s) | C | 60 | 18.3 | 58743 | 2021-07-26 18:51:29 | MASTER-SAAO | (11h 35m 34.27s , -11d 55m 16.2s) | C | 60 | 17.5 | 58823 | 2021-07-26 18:52:49 | MASTER-SAAO | (11h 43m 35.99s , -11d 56m 27.4s) | C | 60 | 17.6 | 58909 | 2021-07-26 18:54:15 | MASTER-SAAO | (11h 40m 50.73s , -13d 50m 17.6s) | C | 60 | 17.5 | 58989 | 2021-07-26 18:55:35 | MASTER-SAAO | (11h 48m 59.35s , -13d 48m 51.6s) | C | 60 | 17.6 | 59072 | 2021-07-26 18:56:58 | MASTER-SAAO | (11h 15m 40.87s , -15d 43m 29.8s) | C | 60 | 15.3 | 59152 | 2021-07-26 18:58:18 | MASTER-SAAO | (11h 23m 58.11s , -15d 41m 50.8s) | C | 60 | 16.2 | 59232 | 2021-07-26 18:59:38 | MASTER-SAAO | (11h 38m 27.13s , -21d 25m 12.9s) | C | 60 | 17.5 | 59313 | 2021-07-26 19:00:59 | MASTER-SAAO | (11h 47m 02.20s , -21d 24m 25.0s) | C | 60 | 17.8 | 59396 | 2021-07-26 19:02:22 | MASTER-SAAO | (11h 47m 02.66s , -15d 43m 17.0s) | C | 60 | 17.0 | 59475 | 2021-07-26 19:03:42 | MASTER-SAAO | (11h 55m 13.32s , -15d 44m 29.4s) | C | 60 | 17.3 | 59555 | 2021-07-26 19:05:01 | MASTER-SAAO | (11h 46m 02.70s , -19d 32m 00.0s) | C | 60 | 17.5 | 59635 | 2021-07-26 19:06:21 | MASTER-SAAO | (11h 54m 27.52s , -19d 30m 56.9s) | C | 60 | 17.7 | 59720 | 2021-07-26 19:07:46 | MASTER-SAAO | (11h 35m 43.91s , -11d 55m 23.7s) | C | 60 | 15.3 | 59804 | 2021-07-26 19:09:11 | MASTER-SAAO | (11h 43m 52.46s , -11d 54m 12.9s) | C | 60 | 16.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.