TITLE: GCN CIRCULAR NUMBER: 31642 SUBJECT: Fermi GRB 220223A: Global MASTER-Net observations report DATE: 22/02/23 21:30:19 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, 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 (Irkutsk State University, API), B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH) A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (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 220223A ( Fermi GBM team, GCN 31640) errorbox 66009 sec after notice time and 66035 sec after trigger time at 2022-02-23 20:35:52 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 68 deg. The sun altitude is -22.1 deg. The galactic latitude b = -75 deg., longitude l = 186 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1892013 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 66065 | 2022-02-23 20:35:52 | MASTER-IAC | (01h 50m 28.60s , -08d 28m 32.7s) | C | 60 | 18.3 | 66065 | 2022-02-23 20:35:52 | MASTER-IAC | (01h 42m 15.18s , -08d 22m 46.6s) | C | 60 | 17.3 | 66145 | 2022-02-23 20:37:12 | MASTER-IAC | (01h 49m 59.85s , -06d 33m 33.1s) | C | 60 | 18.2 | 66145 | 2022-02-23 20:37:12 | MASTER-IAC | (01h 41m 48.58s , -06d 27m 45.8s) | C | 60 | 17.5 | 66225 | 2022-02-23 20:38:32 | MASTER-IAC | (01h 51m 11.47s , -10d 22m 31.5s) | C | 60 | 18.3 | 66225 | 2022-02-23 20:38:32 | MASTER-IAC | (01h 42m 55.21s , -10d 16m 46.5s) | C | 60 | 17.2 | 66305 | 2022-02-23 20:39:51 | MASTER-IAC | (01h 49m 37.14s , -04d 41m 32.4s) | C | 60 | 18.3 | 66305 | 2022-02-23 20:39:51 | MASTER-IAC | (01h 41m 27.20s , -04d 35m 44.1s) | C | 60 | 17.4 | 66385 | 2022-02-23 20:41:11 | MASTER-IAC | (01h 35m 11.59s , -08d 29m 16.0s) | C | 60 | 18.2 | 66385 | 2022-02-23 20:41:11 | MASTER-IAC | (01h 26m 57.56s , -08d 23m 31.6s) | C | 60 | 16.4 | 66465 | 2022-02-23 20:42:31 | MASTER-IAC | (01h 51m 53.10s , -12d 15m 34.1s) | C | 60 | 18.4 | 66465 | 2022-02-23 20:42:31 | MASTER-IAC | (01h 43m 33.28s , -12d 09m 50.6s) | C | 60 | 17.1 | 66545 | 2022-02-23 20:43:52 | MASTER-IAC | (01h 35m 41.23s , -10d 23m 31.9s) | C | 60 | 18.0 | 66545 | 2022-02-23 20:43:52 | MASTER-IAC | (01h 27m 24.16s , -10d 17m 50.7s) | C | 60 | 15.7 | 66625 | 2022-02-23 20:45:11 | MASTER-IAC | (01h 34m 48.13s , -06d 34m 06.4s) | C | 60 | 18.0 | 66625 | 2022-02-23 20:45:11 | MASTER-IAC | (01h 26m 36.14s , -06d 28m 21.4s) | C | 60 | 16.1 | 66705 | 2022-02-23 20:46:31 | MASTER-IAC | (02h 04m 53.12s , -04d 40m 17.5s) | C | 60 | 18.4 | 66705 | 2022-02-23 20:46:31 | MASTER-IAC | (01h 56m 42.95s , -04d 34m 30.3s) | C | 60 | 17.5 | 66865 | 2022-02-23 20:49:12 | MASTER-IAC | (01h 34m 29.56s , -04d 40m 44.6s) | C | 60 | 18.1 | 66865 | 2022-02-23 20:49:12 | MASTER-IAC | (01h 26m 18.95s , -04d 34m 59.5s) | C | 60 | 16.0 | 67146 | 2022-02-23 20:53:52 | MASTER-IAC | (01h 50m 35.05s , -08d 29m 19.6s) | C | 60 | 18.2 | 67146 | 2022-02-23 20:53:52 | MASTER-IAC | (01h 42m 20.72s , -08d 23m 31.6s) | C | 60 | 16.5 | 67225 | 2022-02-23 20:55:12 | MASTER-IAC | (01h 41m 50.05s , -06d 28m 10.6s) | C | 60 | 17.0 | 67225 | 2022-02-23 20:55:12 | MASTER-IAC | (01h 50m 02.18s , -06d 33m 60.0s) | C | 60 | 18.0 | 67306 | 2022-02-23 20:56:32 | MASTER-IAC | (01h 51m 08.26s , -10d 23m 01.4s) | C | 60 | 18.0 | 67306 | 2022-02-23 20:56:32 | MASTER-IAC | (01h 42m 50.99s , -10d 17m 16.6s) | C | 60 | 16.0 | 67386 | 2022-02-23 20:57:52 | MASTER-IAC | (01h 49m 43.37s , -04d 39m 56.5s) | C | 60 | 18.1 | 67386 | 2022-02-23 20:57:52 | MASTER-IAC | (01h 41m 32.77s , -04d 34m 06.4s) | C | 60 | 16.9 | 67467 | 2022-02-23 20:59:13 | MASTER-IAC | (01h 35m 06.20s , -08d 28m 44.1s) | C | 60 | 17.9 | 67547 | 2022-02-23 21:00:33 | MASTER-IAC | (01h 51m 49.80s , -12d 15m 29.4s) | C | 60 | 18.1 | 67547 | 2022-02-23 21:00:33 | MASTER-IAC | (01h 43m 28.91s , -12d 09m 48.0s) | C | 60 | 14.1 | 67628 | 2022-02-23 21:01:54 | MASTER-IAC | (01h 35m 45.04s , -10d 22m 43.3s) | C | 60 | 17.9 | 67708 | 2022-02-23 21:03:14 | MASTER-IAC | (01h 34m 40.57s , -06d 35m 44.2s) | C | 60 | 17.8 | 67788 | 2022-02-23 21:04:34 | MASTER-IAC | (01h 56m 47.92s , -04d 35m 00.8s) | C | 60 | 16.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.