TITLE: GCN CIRCULAR NUMBER: 31569 SUBJECT: Fermi GRB 220210A: Global MASTER-Net observations report DATE: 22/02/11 00:15:18 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 220210A ( Fermi GBM team, GCN 31568) errorbox 552 sec after notice time and 587 sec after trigger time at 2022-02-11 00:06:25 UT, with upper limit up to 16.7 mag. The observations began at zenith distance = 78 deg. The sun altitude is -68.6 deg. The galactic latitude b = -1 deg., longitude l = 121 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1878625 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 647 | 2022-02-11 00:06:25 | MASTER-IAC | (00h 31m 39.20s , +61d 20m 50.9s) | P| | 120 | 16.7 | 647 | 2022-02-11 00:06:25 | MASTER-IAC | (00h 30m 02.27s , +61d 27m 11.3s) | P- | 120 | 16.1 | The observation and reduction will continue. The message may be cited.