TITLE: GCN CIRCULAR NUMBER: 30944 SUBJECT: Fermi GRB 211019A: Global MASTER-Net observations report DATE: 21/10/19 11:00:22 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-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 211019A ( Fermi GBM team, GCN 30941) errorbox 91 sec after notice time and 130 sec after trigger time at 2021-10-19 06:01:42 UT, with upper limit up to 17.3 mag. Observations started at twilight. The observations began at zenith distance = 66 deg. The sun altitude is -14.8 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 211019A errorbox 10590 sec after notice time and 10629 sec after trigger time at 2021-10-19 08:56:41 UT, with upper limit up to 17.6 mag. Observations started at twilight. The observations began at zenith distance = 14 deg. The sun altitude is -12.1 deg. The galactic latitude b = -12 deg., longitude l = 251 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1756842 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 146 | 2021-10-19 06:01:42 | MASTER-IAC | (07h 17m 09.18s , -37d 56m 16.1s) | P| | 30 | 13.8 | 186 | 2021-10-19 06:01:42 | MASTER-IAC | (07h 17m 09.18s , -37d 56m 16.1s) | P| | 110 | 14.7 | Coadd 146 | 2021-10-19 06:01:42 | MASTER-IAC | (07h 16m 10.91s , -37d 50m 38.7s) | P- | 30 | 13.5 | 186 | 2021-10-19 06:01:42 | MASTER-IAC | (07h 16m 10.91s , -37d 50m 38.7s) | P- | 110 | 14.6 | Coadd 197 | 2021-10-19 06:02:33 | MASTER-IAC | (07h 17m 04.65s , -37d 56m 56.7s) | P| | 30 | 13.9 | 197 | 2021-10-19 06:02:33 | MASTER-IAC | (07h 16m 06.36s , -37d 51m 18.8s) | P- | 30 | 13.9 | 257 | 2021-10-19 06:03:23 | MASTER-IAC | (07h 17m 04.32s , -37d 55m 58.0s) | P| | 50 | 14.5 | 257 | 2021-10-19 06:03:23 | MASTER-IAC | (07h 16m 06.03s , -37d 50m 20.6s) | P- | 50 | 14.4 | 334 | 2021-10-19 06:04:34 | MASTER-IAC | (07h 17m 09.19s , -37d 56m 59.7s) | P| | 60 | 16.0 | 424 | 2021-10-19 06:04:34 | MASTER-IAC | (07h 17m 09.20s , -37d 56m 59.7s) | P| | 240 | 17.3 | Coadd 334 | 2021-10-19 06:04:34 | MASTER-IAC | (07h 16m 10.90s , -37d 51m 23.7s) | P- | 60 | 15.7 | 424 | 2021-10-19 06:04:34 | MASTER-IAC | (07h 16m 10.90s , -37d 51m 23.7s) | P- | 240 | 17.1 | Coadd 424 | 2021-10-19 06:05:55 | MASTER-IAC | (07h 17m 04.40s , -37d 58m 01.9s) | P| | 80 | 16.6 | 424 | 2021-10-19 06:05:55 | MASTER-IAC | (07h 16m 06.17s , -37d 52m 25.3s) | P- | 80 | 16.4 | 535 | 2021-10-19 06:07:35 | MASTER-IAC | (07h 17m 10.22s , -37d 58m 01.5s) | P| | 100 | 17.1 | 535 | 2021-10-19 06:07:35 | MASTER-IAC | (07h 16m 12.08s , -37d 52m 25.3s) | P- | 100 | 16.9 | 665 | 2021-10-19 06:09:36 | MASTER-IAC | (07h 17m 07.05s , -37d 56m 23.7s) | P| | 120 | 17.3 | 665 | 2021-10-19 06:09:36 | MASTER-IAC | (07h 16m 08.99s , -37d 50m 47.4s) | P- | 120 | 17.1 | 10660 | 2021-10-19 08:56:41 | MASTER-OAFA | (07h 10m 41.71s , -39d 22m 20.0s) | C | 60 | 17.6 | 10903 | 2021-10-19 09:00:43 | MASTER-OAFA | (07h 08m 39.36s , -37d 27m 29.3s) | C | 60 | 17.5 | 10983 | 2021-10-19 09:02:04 | MASTER-OAFA | (07h 18m 38.70s , -37d 26m 09.7s) | C | 60 | 17.3 | 11381 | 2021-10-19 09:08:42 | MASTER-OAFA | (07h 12m 16.15s , -41d 14m 31.8s) | C | 60 | 16.7 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.