TITLE: GCN CIRCULAR NUMBER: 41337 SUBJECT: IceCube Alert 250813.14: Global MASTER-Net observations report DATE: 25/08/13 07:40:23 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) 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 IceCube Alert 250813.14 (trigger No 9390028,18h 21m 25.68s , +08d 35m 38.4s, R=1.46) errorbox 28 sec after notice time and 83 sec after trigger time at 2025-08-13 03:22:33 UT, with upper limit up to 18.9 mag. The observations began at zenith distance = 48 deg. The sun altitude is -66.0 deg. The galactic latitude b = 10 deg., longitude l = 38 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2967299 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 93 | 2025-08-13 03:22:33 | MASTER-OAFA | (18h 21m 47.85s , +08d 34m 54.8s) | C | 20 | 18.0 | 178 | 2025-08-13 03:22:33 | MASTER-OAFA | (18h 21m 47.86s , +08d 34m 54.7s) | C | 190 | 18.6 | Coadd 119 | 2025-08-13 03:22:58 | MASTER-OAFA | (18h 21m 47.86s , +08d 34m 56.2s) | C | 20 | 18.0 | 150 | 2025-08-13 03:23:24 | MASTER-OAFA | (18h 21m 47.87s , +08d 34m 57.4s) | C | 30 | 18.0 | 186 | 2025-08-13 03:24:00 | MASTER-OAFA | (18h 21m 47.85s , +08d 34m 58.9s) | C | 30 | 17.8 | 227 | 2025-08-13 03:24:36 | MASTER-OAFA | (18h 21m 47.85s , +08d 35m 00.1s) | C | 40 | 17.9 | 278 | 2025-08-13 03:25:22 | MASTER-OAFA | (18h 21m 47.86s , +08d 35m 01.4s) | C | 50 | 18.3 | 339 | 2025-08-13 03:26:18 | MASTER-OAFA | (18h 21m 47.84s , +08d 35m 03.0s) | C | 60 | 18.2 | 409 | 2025-08-13 03:27:24 | MASTER-OAFA | (18h 21m 47.82s , +08d 35m 04.7s) | C | 70 | 18.3 | 495 | 2025-08-13 03:28:40 | MASTER-OAFA | (18h 21m 47.81s , +08d 35m 06.6s) | C | 90 | 18.5 | 601 | 2025-08-13 03:30:15 | MASTER-OAFA | (18h 21m 47.78s , +08d 35m 08.8s) | C | 110 | 18.5 | 721 | 2025-08-13 03:30:15 | MASTER-OAFA | (18h 21m 47.78s , +08d 35m 08.8s) | C | 350 | 18.9 | Coadd 723 | 2025-08-13 03:32:12 | MASTER-OAFA | (18h 21m 47.74s , +08d 35m 10.8s) | C | 120 | 18.6 | 849 | 2025-08-13 03:34:18 | MASTER-OAFA | (18h 21m 47.74s , +08d 35m 13.1s) | C | 120 | 18.6 | 975 | 2025-08-13 03:36:24 | MASTER-OAFA | (18h 21m 47.74s , +08d 35m 15.2s) | C | 120 | 18.7 | 1101 | 2025-08-13 03:38:30 | MASTER-OAFA | (18h 21m 47.72s , +08d 35m 17.0s) | C | 120 | 18.7 | 1227 | 2025-08-13 03:40:36 | MASTER-OAFA | (18h 21m 47.69s , +08d 35m 18.6s) | C | 120 | 18.7 | 1353 | 2025-08-13 03:42:43 | MASTER-OAFA | (18h 21m 47.69s , +08d 35m 20.0s) | C | 120 | 18.6 | 1480 | 2025-08-13 03:44:49 | MASTER-OAFA | (18h 21m 47.67s , +08d 35m 21.5s) | C | 120 | 18.7 | 1606 | 2025-08-13 03:46:55 | MASTER-OAFA | (18h 21m 47.64s , +08d 35m 22.7s) | C | 120 | 18.6 | 1732 | 2025-08-13 03:49:01 | MASTER-OAFA | (18h 21m 47.63s , +08d 35m 24.1s) | C | 120 | 18.7 | 1858 | 2025-08-13 03:51:07 | MASTER-OAFA | (18h 21m 47.60s , +08d 35m 25.4s) | C | 120 | 18.7 | 1984 | 2025-08-13 03:53:13 | MASTER-OAFA | (18h 21m 47.57s , +08d 35m 26.4s) | C | 120 | 18.8 | 2110 | 2025-08-13 03:55:19 | MASTER-OAFA | (18h 21m 47.55s , +08d 35m 27.4s) | C | 120 | 18.7 | 2236 | 2025-08-13 03:57:25 | MASTER-OAFA | (18h 21m 47.49s , +08d 35m 28.2s) | C | 120 | 18.7 | 2362 | 2025-08-13 03:59:31 | MASTER-OAFA | (18h 21m 47.45s , +08d 35m 29.1s) | C | 120 | 18.7 | 2488 | 2025-08-13 04:01:37 | MASTER-OAFA | (18h 21m 47.41s , +08d 35m 30.3s) | C | 120 | 18.7 | 2614 | 2025-08-13 04:03:43 | MASTER-OAFA | (18h 21m 47.40s , +08d 35m 31.3s) | C | 120 | 18.5 | 2740 | 2025-08-13 04:05:49 | MASTER-OAFA | (18h 21m 47.39s , +08d 35m 32.2s) | C | 120 | 18.3 | 2866 | 2025-08-13 04:07:56 | MASTER-OAFA | (18h 21m 47.39s , +08d 35m 33.2s) | C | 120 | 18.6 | 2993 | 2025-08-13 04:10:02 | MASTER-OAFA | (18h 21m 47.38s , +08d 35m 33.6s) | C | 120 | 18.6 | 3119 | 2025-08-13 04:12:09 | MASTER-OAFA | (18h 21m 47.39s , +08d 35m 34.5s) | C | 120 | 18.5 | 3246 | 2025-08-13 04:14:15 | MASTER-OAFA | (18h 21m 47.36s , +08d 35m 35.2s) | C | 120 | 18.6 | 3371 | 2025-08-13 04:16:21 | MASTER-OAFA | (18h 21m 47.35s , +08d 35m 35.8s) | C | 120 | 18.6 | 3497 | 2025-08-13 04:18:27 | MASTER-OAFA | (18h 21m 47.33s , +08d 35m 36.2s) | C | 120 | 18.7 | 3623 | 2025-08-13 04:20:33 | MASTER-OAFA | (18h 21m 47.31s , +08d 35m 36.5s) | C | 120 | 18.7 | 3749 | 2025-08-13 04:22:39 | MASTER-OAFA | (18h 21m 47.27s , +08d 35m 36.5s) | C | 120 | 18.6 | 3875 | 2025-08-13 04:24:45 | MASTER-OAFA | (18h 21m 47.24s , +08d 35m 36.8s) | C | 120 | 18.7 | 4001 | 2025-08-13 04:26:50 | MASTER-OAFA | (18h 21m 47.21s , +08d 35m 37.3s) | C | 120 | 18.7 | 4121 | 2025-08-13 04:26:50 | MASTER-OAFA | (18h 21m 47.21s , +08d 35m 37.3s) | C | 360 | 18.9 | Coadd 4127 | 2025-08-13 04:28:57 | MASTER-OAFA | (18h 21m 47.19s , +08d 35m 37.5s) | C | 120 | 18.7 | 4254 | 2025-08-13 04:31:03 | MASTER-OAFA | (18h 21m 47.21s , +08d 35m 38.2s) | C | 120 | 18.6 | 4380 | 2025-08-13 04:33:09 | MASTER-OAFA | (18h 21m 47.19s , +08d 35m 38.3s) | C | 120 | 18.5 | 4500 | 2025-08-13 04:33:09 | MASTER-OAFA | (18h 21m 47.19s , +08d 35m 38.3s) | C | 360 | 18.8 | Coadd 4507 | 2025-08-13 04:35:16 | MASTER-OAFA | (18h 21m 47.17s , +08d 35m 38.4s) | C | 120 | 18.6 | 4633 | 2025-08-13 04:37:22 | MASTER-OAFA | (18h 21m 47.16s , +08d 35m 38.9s) | C | 120 | 18.5 | 4759 | 2025-08-13 04:39:28 | MASTER-OAFA | (18h 21m 47.15s , +08d 35m 39.2s) | C | 120 | 18.6 | 4885 | 2025-08-13 04:41:34 | MASTER-OAFA | (18h 21m 47.16s , +08d 35m 39.5s) | C | 120 | 18.5 | 5011 | 2025-08-13 04:43:40 | MASTER-OAFA | (18h 21m 47.10s , +08d 35m 39.6s) | C | 120 | 18.6 | 5137 | 2025-08-13 04:45:46 | MASTER-OAFA | (18h 21m 47.07s , +08d 35m 39.2s) | C | 120 | 18.5 | 5263 | 2025-08-13 04:47:52 | MASTER-OAFA | (18h 21m 47.02s , +08d 35m 39.0s) | C | 120 | 18.5 | 5389 | 2025-08-13 04:49:58 | MASTER-OAFA | (18h 21m 46.99s , +08d 35m 38.8s) | C | 120 | 18.5 | 5515 | 2025-08-13 04:52:04 | MASTER-OAFA | (18h 21m 46.99s , +08d 35m 38.5s) | C | 120 | 18.6 | 5635 | 2025-08-13 04:52:04 | MASTER-OAFA | (18h 21m 47.00s , +08d 35m 38.5s) | C | 360 | 18.8 | Coadd 5641 | 2025-08-13 04:54:10 | MASTER-OAFA | (18h 21m 47.00s , +08d 35m 38.3s) | C | 120 | 18.6 | 5767 | 2025-08-13 04:56:16 | MASTER-OAFA | (18h 21m 46.96s , +08d 35m 38.2s) | C | 120 | 18.5 | 5893 | 2025-08-13 04:58:23 | MASTER-OAFA | (18h 21m 46.95s , +08d 35m 38.0s) | C | 120 | 18.6 | 6013 | 2025-08-13 04:58:23 | MASTER-OAFA | (18h 21m 46.95s , +08d 35m 38.0s) | C | 360 | 18.9 | Coadd 6019 | 2025-08-13 05:00:28 | MASTER-OAFA | (18h 21m 46.94s , +08d 35m 38.1s) | C | 120 | 18.6 | 6145 | 2025-08-13 05:02:34 | MASTER-OAFA | (18h 21m 46.93s , +08d 35m 37.9s) | C | 120 | 18.6 | 6271 | 2025-08-13 05:04:40 | MASTER-OAFA | (18h 21m 46.92s , +08d 35m 38.0s) | C | 120 | 18.5 | 6397 | 2025-08-13 05:06:47 | MASTER-OAFA | (18h 21m 46.90s , +08d 35m 37.8s) | C | 120 | 18.4 | 6524 | 2025-08-13 05:08:53 | MASTER-OAFA | (18h 21m 46.89s , +08d 35m 37.7s) | C | 120 | 18.4 | 6649 | 2025-08-13 05:10:59 | MASTER-OAFA | (18h 21m 46.88s , +08d 35m 37.3s) | C | 120 | 18.3 | 6775 | 2025-08-13 05:13:04 | MASTER-OAFA | (18h 21m 46.85s , +08d 35m 36.9s) | C | 120 | 18.5 | 6901 | 2025-08-13 05:15:11 | MASTER-OAFA | (18h 21m 46.82s , +08d 35m 36.5s) | C | 120 | 18.5 | 7028 | 2025-08-13 05:17:17 | MASTER-OAFA | (18h 21m 46.79s , +08d 35m 36.5s) | C | 120 | 18.5 | 7154 | 2025-08-13 05:19:23 | MASTER-OAFA | (18h 21m 46.81s , +08d 35m 36.2s) | C | 120 | 18.5 | 7280 | 2025-08-13 05:21:29 | MASTER-OAFA | (18h 21m 46.78s , +08d 35m 36.1s) | C | 120 | 18.3 | 7406 | 2025-08-13 05:23:35 | MASTER-OAFA | (18h 21m 46.78s , +08d 35m 35.8s) | C | 120 | 18.3 | 7526 | 2025-08-13 05:23:35 | MASTER-OAFA | (18h 21m 46.78s , +08d 35m 35.7s) | C | 360 | 18.7 | Coadd 7532 | 2025-08-13 05:25:41 | MASTER-OAFA | (18h 21m 46.79s , +08d 35m 35.0s) | C | 120 | 18.4 | 7658 | 2025-08-13 05:27:47 | MASTER-OAFA | (18h 21m 46.76s , +08d 35m 34.5s) | C | 120 | 18.4 | 7784 | 2025-08-13 05:29:53 | MASTER-OAFA | (18h 21m 46.72s , +08d 35m 34.2s) | C | 120 | 18.3 | 7910 | 2025-08-13 05:31:59 | MASTER-OAFA | (18h 21m 46.68s , +08d 35m 33.9s) | C | 120 | 18.2 | 8036 | 2025-08-13 05:34:05 | MASTER-OAFA | (18h 21m 46.65s , +08d 35m 32.9s) | C | 120 | 18.1 | 8162 | 2025-08-13 05:36:11 | MASTER-OAFA | (18h 21m 46.61s , +08d 35m 32.0s) | C | 120 | 18.2 | 8282 | 2025-08-13 05:36:11 | MASTER-OAFA | (18h 21m 46.61s , +08d 35m 32.1s) | C | 360 | 18.5 | Coadd 8288 | 2025-08-13 05:38:17 | MASTER-OAFA | (18h 21m 46.58s , +08d 35m 32.0s) | C | 120 | 18.2 | 8414 | 2025-08-13 05:40:23 | MASTER-OAFA | (18h 21m 46.55s , +08d 35m 31.9s) | C | 120 | 18.2 | 8540 | 2025-08-13 05:42:29 | MASTER-OAFA | (18h 21m 46.53s , +08d 35m 31.4s) | C | 120 | 18.0 | 8660 | 2025-08-13 05:42:29 | MASTER-OAFA | (18h 21m 46.52s , +08d 35m 31.5s) | C | 360 | 18.3 | Coadd 8666 | 2025-08-13 05:44:35 | MASTER-OAFA | (18h 21m 46.47s , +08d 35m 31.7s) | C | 120 | 17.9 | 8792 | 2025-08-13 05:46:41 | MASTER-OAFA | (18h 21m 46.41s , +08d 35m 31.3s) | C | 120 | 17.8 | 8919 | 2025-08-13 05:48:48 | MASTER-OAFA | (18h 21m 46.37s , +08d 35m 30.5s) | C | 120 | 17.8 | 9039 | 2025-08-13 05:48:48 | MASTER-OAFA | (18h 21m 46.38s , +08d 35m 30.5s) | C | 360 | 18.1 | Coadd 9044 | 2025-08-13 05:50:54 | MASTER-OAFA | (18h 21m 46.34s , +08d 35m 30.0s) | C | 120 | 17.8 | 9171 | 2025-08-13 05:53:00 | MASTER-OAFA | (18h 21m 46.27s , +08d 35m 29.3s) | C | 120 | 17.7 | 9297 | 2025-08-13 05:55:06 | MASTER-OAFA | (18h 21m 46.19s , +08d 35m 28.6s) | C | 120 | 17.6 | 9423 | 2025-08-13 05:57:12 | MASTER-OAFA | (18h 21m 46.14s , +08d 35m 27.6s) | C | 120 | 17.6 | 9549 | 2025-08-13 05:59:18 | MASTER-OAFA | (18h 21m 46.09s , +08d 35m 26.7s) | C | 120 | 17.5 | 9675 | 2025-08-13 06:01:24 | MASTER-OAFA | (18h 21m 46.10s , +08d 35m 25.6s) | C | 120 | 17.2 | 9795 | 2025-08-13 06:01:24 | MASTER-OAFA | (18h 21m 46.10s , +08d 35m 25.6s) | C | 360 | 17.5 | Coadd 9801 | 2025-08-13 06:03:30 | MASTER-OAFA | (18h 21m 46.07s , +08d 35m 25.2s) | C | 120 | 17.0 | 9927 | 2025-08-13 06:05:36 | MASTER-OAFA | (18h 21m 46.11s , +08d 35m 23.9s) | C | 120 | 17.0 | 10053 | 2025-08-13 06:07:42 | MASTER-OAFA | (18h 21m 46.06s , +08d 35m 23.1s) | C | 120 | 17.0 | 10179 | 2025-08-13 06:09:49 | MASTER-OAFA | (18h 21m 46.04s , +08d 35m 22.4s) | C | 120 | 17.0 | 10306 | 2025-08-13 06:11:55 | MASTER-OAFA | (18h 21m 45.97s , +08d 35m 22.0s) | C | 120 | 16.7 | 10432 | 2025-08-13 06:14:01 | MASTER-OAFA | (18h 21m 45.92s , +08d 35m 21.4s) | C | 120 | 16.3 | 10558 | 2025-08-13 06:16:07 | MASTER-OAFA | (18h 21m 45.87s , +08d 35m 20.9s) | C | 120 | 15.6 | 10684 | 2025-08-13 06:18:13 | MASTER-OAFA | (18h 21m 45.92s , +08d 35m 19.9s) | C | 120 | 14.8 | 10810 | 2025-08-13 06:20:19 | MASTER-OAFA | (18h 21m 45.96s , +08d 35m 18.0s) | C | 120 | 14.4 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/41337. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...