TITLE: GCN CIRCULAR NUMBER: 32242 SUBJECT: Fermi trigger No 677597318: Global MASTER-Net observations report DATE: 22/06/23 05:15:18 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, 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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB220622.56 (trigger No 677597318,01h 16m 16.80s , -29d 00m 36.0s, R=10.96) errorbox 53604 sec after notice time and 53639 sec after trigger time at 2022-06-23 04:22:33 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 79 deg. The sun altitude is -81.8 deg. The galactic latitude b = -84 deg., longitude l = 230 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2013003 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 53669 | 2022-06-23 04:22:33 | MASTER-OAFA | (00h 21m 30.79s , -33d 48m 24.3s) | C | 60 | 17.5 | 54830 | 2022-06-23 04:41:54 | MASTER-OAFA | (00h 21m 28.78s , -33d 49m 08.2s) | C | 60 | 17.7 | 56232 | 2022-06-23 05:05:15 | MASTER-OAFA | (00h 21m 30.68s , -33d 48m 35.5s) | C | 60 | 17.8 | 56482 | 2022-06-23 05:09:25 | MASTER-OAFA | (00h 56m 33.52s , -31d 53m 27.3s) | C | 60 | 17.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.