TITLE: GCN CIRCULAR NUMBER: 32840 SUBJECT: LAT GRB221025.04: Global MASTER-Net observations report DATE: 22/10/25 08:55:10 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the LAT GRB221025.04 (trigger No 688352303,08h 53m 31.20s , +10d 59m 24.0s, R=1.26) errorbox 73 sec after trigger time at 2022-10-25 00:59:31 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 49 deg. The sun altitude is -29.1 deg. The galactic latitude b = 33 deg., longitude l = 217 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2133296 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 78 | 2022-10-25 00:59:31 | MASTER-Kislovodsk | (08h 48m 26.64s , +10d 04m 09.5s) | C | 10 | 16.8 | 113 | 2022-10-25 00:59:31 | MASTER-Kislovodsk | (08h 48m 26.64s , +10d 04m 09.2s) | C | 80 | 17.7 | Coadd 78 | 2022-10-25 00:59:31 | MASTER-Kislovodsk | (08h 52m 50.67s , +09d 40m 31.3s) | C | 10 | 16.6 | 113 | 2022-10-25 01:00:01 | MASTER-Kislovodsk | (08h 48m 32.72s , +10d 03m 07.0s) | C | 20 | 16.5 | 114 | 2022-10-25 01:00:01 | MASTER-Kislovodsk | (08h 52m 56.62s , +09d 39m 27.4s) | C | 20 | 16.6 | 159 | 2022-10-25 01:00:41 | MASTER-Kislovodsk | (08h 48m 26.80s , +10d 02m 05.3s) | C | 30 | 17.0 | 159 | 2022-10-25 01:00:41 | MASTER-Kislovodsk | (08h 52m 50.65s , +09d 38m 25.1s) | C | 30 | 17.4 | 214 | 2022-10-25 01:01:31 | MASTER-Kislovodsk | (08h 48m 32.76s , +10d 02m 05.4s) | C | 40 | 17.3 | 214 | 2022-10-25 01:01:32 | MASTER-Kislovodsk | (08h 52m 56.63s , +09d 38m 24.8s) | C | 40 | 17.8 | 278 | 2022-10-25 01:02:31 | MASTER-Kislovodsk | (08h 48m 30.73s , +10d 03m 46.4s) | C | 50 | 17.5 | 278 | 2022-10-25 01:02:31 | MASTER-Kislovodsk | (08h 52m 54.63s , +09d 40m 05.3s) | C | 50 | 18.0 | 354 | 2022-10-25 01:03:42 | MASTER-Kislovodsk | (08h 48m 30.83s , +10d 02m 32.6s) | C | 60 | 17.4 | 354 | 2022-10-25 01:03:42 | MASTER-Kislovodsk | (08h 52m 54.73s , +09d 38m 51.0s) | C | 60 | 17.7 | 1265 | 2022-10-25 01:17:53 | MASTER-Kislovodsk | (08h 42m 33.57s , +12d 20m 52.2s) | C | 180 | 18.0 | 1265 | 2022-10-25 01:17:53 | MASTER-Kislovodsk | (08h 47m 01.30s , +11d 57m 15.5s) | C | 180 | 17.9 | 1466 | 2022-10-25 01:21:14 | MASTER-Kislovodsk | (08h 46m 55.31s , +11d 56m 45.6s) | C | 180 | 18.1 | 1466 | 2022-10-25 01:21:14 | MASTER-Kislovodsk | (08h 42m 27.46s , +12d 20m 21.1s) | C | 180 | 18.1 | 1667 | 2022-10-25 01:24:34 | MASTER-Kislovodsk | (08h 42m 27.47s , +12d 21m 25.0s) | C | 180 | 18.0 | 1667 | 2022-10-25 01:24:34 | MASTER-Kislovodsk | (08h 46m 55.52s , +11d 57m 50.4s) | C | 180 | 17.8 | 1867 | 2022-10-25 01:27:55 | MASTER-Kislovodsk | (08h 42m 33.31s , +12d 20m 29.2s) | C | 180 | 17.8 | 1867 | 2022-10-25 01:27:55 | MASTER-Kislovodsk | (08h 47m 01.68s , +11d 56m 55.0s) | C | 180 | 17.6 | 3748 | 2022-10-25 01:59:16 | MASTER-Kislovodsk | (08h 42m 43.32s , +12d 21m 59.0s) | C | 180 | 18.5 | 3748 | 2022-10-25 01:59:16 | MASTER-Kislovodsk | (08h 47m 04.36s , +11d 58m 23.2s) | C | 180 | 18.3 | 4194 | 2022-10-25 02:06:42 | MASTER-Kislovodsk | (08h 42m 34.56s , +12d 22m 29.3s) | C | 180 | 18.1 | 4194 | 2022-10-25 02:06:42 | MASTER-Kislovodsk | (08h 46m 57.79s , +11d 58m 06.3s) | C | 180 | 18.8 | 5067 | 2022-10-25 02:21:15 | MASTER-Kislovodsk | (08h 42m 37.61s , +12d 22m 18.4s) | C | 180 | 18.3 | 5067 | 2022-10-25 02:21:15 | MASTER-Kislovodsk | (08h 47m 02.20s , +11d 57m 59.1s) | C | 180 | 18.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.