TITLE: GCN CIRCULAR NUMBER: 32232 SUBJECT: Integral GRB220619.53: Global MASTER-Net observations report DATE: 22/06/20 05:19:24 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, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin (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), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the Integral GRB220619.53 (trigger No 9962,19h 34m 57.38s , +21d 51m 05.1s, R=0.0546667) errorbox 6676 sec after notice time and 6687 sec after trigger time at 2022-06-19 14:37:50 UT, with upper limit up to 12.2 mag. Observations started at twilight. The observations began at zenith distance = 41 deg. The sun altitude is -15.6 deg. MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) was pointed to the Integral GRB220619.53 errorbox 49078 sec after notice time and 49090 sec after trigger time at 2022-06-20 02:24:33 UT, with upper limit up to 14.8 mag. The observations began at zenith distance = 77 deg. The sun altitude is -59.9 deg. MASTER-OAGH robotic telescope located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) was pointed to the Integral GRB220619.53 errorbox 58727 sec after notice time and 58739 sec after trigger time at 2022-06-20 05:05:21 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 53 deg. The sun altitude is -26.7 deg. The galactic latitude b = 0 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=2010368 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 6777 | MASTER-Amur | P\ | 180 | 12.2 | 49180 | MASTER-OAFA | C | 180 | 14.8 | 58829 | MASTER-OAGH | C | 180 | 18.5 | 58829 | MASTER-OAGH | C | 180 | 18.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.