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[vsnet-grb-info 40686] Fermi trigger No 784279167: Global MASTER-Net observations report
by GCN Circulars 08 Nov '25

08 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42623 SUBJECT: Fermi trigger No 784279167: Global MASTER-Net observations report DATE: 25/11/08 16:15:23 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)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-Kislovodsk robotic telescope [1] located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB251108.31 (trigger No 784279167,06h 35m 02.40s , +73d 27m 36.0s, R=4.66) errorbox 29979 sec after notice time and 30021 sec after trigger time at 2025-11-08 15:39:43 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 61 deg. The sun altitude is -19.5 deg. The galactic latitude b = 25 deg., longitude l = 141 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3035666 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 30051 | 2025-11-08 15:39:43 | MASTER-Kislovodsk | (07h 04m 56.02s , +73d 17m 35.4s) | C | 60 | 17.1 | 30051 | 2025-11-08 15:39:43 | MASTER-Kislovodsk | (07h 18m 49.65s , +72d 53m 17.3s) | C | 60 | 17.6 | 30143 | 2025-11-08 15:41:14 | MASTER-Kislovodsk | (06h 22m 49.76s , +71d 23m 22.2s) | C | 60 | 17.1 | 30144 | 2025-11-08 15:41:15 | MASTER-Kislovodsk | (06h 35m 19.95s , +70d 59m 12.3s) | C | 60 | 17.8 | 30226 | 2025-11-08 15:42:37 | MASTER-Kislovodsk | (06h 12m 21.08s , +73d 19m 19.9s) | C | 60 | 17.3 | 30226 | 2025-11-08 15:42:37 | MASTER-Kislovodsk | (06h 26m 14.47s , +72d 54m 55.0s) | C | 60 | 17.8 | 30306 | 2025-11-08 15:43:57 | MASTER-Kislovodsk | (06h 58m 57.48s , +75d 11m 25.4s) | C | 60 | 17.3 | 30306 | 2025-11-08 15:43:57 | MASTER-Kislovodsk | (07h 14m 33.39s , +74d 46m 47.7s) | C | 60 | 17.8 | 30386 | 2025-11-08 15:45:18 | MASTER-Kislovodsk | (07h 10m 21.00s , +71d 23m 25.8s) | C | 60 | 17.2 | 30386 | 2025-11-08 15:45:18 | MASTER-Kislovodsk | (07h 22m 51.41s , +70d 59m 07.0s) | C | 60 | 17.8 | 30466 | 2025-11-08 15:46:38 | MASTER-Kislovodsk | (05h 59m 42.72s , +75d 13m 28.7s) | C | 60 | 17.4 | 30466 | 2025-11-08 15:46:38 | MASTER-Kislovodsk | (06h 15m 17.99s , +74d 48m 38.2s) | C | 60 | 18.1 | 30546 | 2025-11-08 15:47:57 | MASTER-Kislovodsk | (06h 51m 33.54s , +77d 04m 04.7s) | C | 60 | 17.2 | 30546 | 2025-11-08 15:47:58 | MASTER-Kislovodsk | (07h 09m 18.89s , +76d 38m 56.3s) | C | 60 | 17.8 | 30626 | 2025-11-08 15:49:18 | MASTER-Kislovodsk | (06h 31m 59.52s , +69d 30m 50.0s) | C | 60 | 17.0 | 30626 | 2025-11-08 15:49:18 | MASTER-Kislovodsk | (06h 43m 23.61s , +69d 06m 38.5s) | C | 60 | 17.7 | 30787 | 2025-11-08 15:51:58 | MASTER-Kislovodsk | (05h 43m 40.85s , +77d 09m 58.1s) | C | 60 | 17.0 | 30787 | 2025-11-08 15:51:58 | MASTER-Kislovodsk | (06h 01m 36.06s , +76d 44m 46.8s) | C | 60 | 18.0 | 30867 | 2025-11-08 15:53:19 | MASTER-Kislovodsk | (06h 42m 16.62s , +78d 58m 54.4s) | C | 60 | 17.3 | 30867 | 2025-11-08 15:53:19 | MASTER-Kislovodsk | (07h 03m 02.62s , +78d 33m 30.5s) | C | 60 | 18.0 | 30947 | 2025-11-08 15:54:38 | MASTER-Kislovodsk | (07h 57m 46.40s , +73d 16m 03.6s) | C | 60 | 17.1 | 31045 | 2025-11-08 15:56:17 | MASTER-Kislovodsk | (05h 48m 45.00s , +69d 33m 17.8s) | C | 60 | 17.1 | 31045 | 2025-11-08 15:56:17 | MASTER-Kislovodsk | (06h 00m 11.32s , +69d 08m 50.8s) | C | 60 | 17.5 | 31125 | 2025-11-08 15:57:36 | MASTER-Kislovodsk | (05h 43m 39.70s , +78d 38m 58.2s) | C | 60 | 17.9 | 31204 | 2025-11-08 15:58:56 | MASTER-Kislovodsk | (05h 35m 23.59s , +71d 26m 31.9s) | C | 60 | 17.2 | 31205 | 2025-11-08 15:58:56 | MASTER-Kislovodsk | (05h 47m 57.39s , +71d 01m 58.5s) | C | 60 | 17.7 | 31284 | 2025-11-08 16:00:16 | MASTER-Kislovodsk | (05h 19m 36.38s , +73d 21m 51.5s) | C | 60 | 17.2 | 31284 | 2025-11-08 16:00:16 | MASTER-Kislovodsk | (05h 33m 32.73s , +72d 57m 04.6s) | C | 60 | 17.8 | 31407 | 2025-11-08 16:02:19 | MASTER-Kislovodsk | (07h 57m 57.10s , +71d 20m 23.5s) | C | 60 | 17.1 | 31487 | 2025-11-08 16:03:39 | MASTER-Kislovodsk | (07h 58m 20.11s , +75d 08m 19.9s) | C | 60 | 17.2 | 31567 | 2025-11-08 16:04:59 | MASTER-Kislovodsk | (06h 40m 00.61s , +67d 37m 33.6s) | C | 60 | 17.0 | 31567 | 2025-11-08 16:04:59 | MASTER-Kislovodsk | (06h 50m 28.66s , +67d 13m 08.7s) | C | 60 | 17.5 | 31648 | 2025-11-08 16:06:20 | MASTER-Kislovodsk | (05h 00m 19.14s , +75d 16m 51.6s) | C | 60 | 17.2 | 31648 | 2025-11-08 16:06:20 | MASTER-Kislovodsk | (05h 15m 58.57s , +74d 51m 43.2s) | C | 60 | 17.7 | 31764 | 2025-11-08 16:08:16 | MASTER-Kislovodsk | (07h 59m 35.77s , +77d 04m 16.4s) | C | 60 | 17.2 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/42623. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40685] SVOM GRB251108.54: Global MASTER-Net observations report
by GCN Circulars 08 Nov '25

08 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42622 SUBJECT: SVOM GRB251108.54: Global MASTER-Net observations report DATE: 25/11/08 13:42:25 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)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-Tunka robotic telescope [1] located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the SVOM GRB251108.54 (trigger No 1762606617,10h 51m 27.41s , +61d 22m 00.5s, R=1) errorbox 27 sec after notice time and 57 sec after trigger time at 2025-11-08 12:57:54 UT, with upper limit up to 14.6 mag. The observations began at zenith distance = 67 deg. The sun altitude is -32.8 deg. The galactic latitude b = 51 deg., longitude l = 145 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3035823 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 63 | 2025-11-08 12:57:54 | MASTER-Tunka | (10h 52m 29.63s , +61d 58m 59.2s) | P- | 10 | 13.2 | 63 | 2025-11-08 12:57:54 | MASTER- | (10h 51m 53.18s , +62d 04m 17.1s) | C | 10 | 17.1 | 86 | 2025-11-08 12:58:13 | MASTER-Tunka | (10h 52m 29.56s , +61d 59m 00.9s) | P- | 20 | 14.0 | 86 | 2025-11-08 12:58:13 | MASTER- | (10h 51m 53.22s , +62d 04m 17.9s) | C | 20 | 17.3 | 110 | 2025-11-08 12:58:37 | MASTER-Tunka | (10h 52m 29.57s , +61d 59m 01.1s) | P- | 20 | 13.6 | 110 | 2025-11-08 12:58:37 | MASTER- | (10h 51m 53.24s , +62d 04m 18.4s) | C | 20 | 17.5 | 134 | 2025-11-08 12:59:00 | MASTER-Tunka | (10h 52m 29.60s , +61d 59m 02.1s) | P- | 20 | 13.8 | 134 | 2025-11-08 12:59:00 | MASTER- | (10h 51m 53.20s , +62d 04m 19.3s) | C | 20 | 17.4 | 162 | 2025-11-08 12:59:24 | MASTER-Tunka | (10h 52m 29.47s , +61d 59m 03.0s) | P- | 30 | 13.8 | 162 | 2025-11-08 12:59:24 | MASTER- | (10h 51m 53.19s , +62d 04m 19.8s) | C | 30 | 17.6 | 201 | 2025-11-08 12:59:57 | MASTER-Tunka | (10h 52m 29.45s , +61d 59m 03.8s) | P- | 40 | 14.1 | 201 | 2025-11-08 12:59:57 | MASTER- | (10h 51m 53.15s , +62d 04m 20.3s) | C | 40 | 17.7 | 245 | 2025-11-08 13:00:42 | MASTER-Tunka | (10h 52m 29.33s , +61d 59m 05.0s) | P- | 40 | 13.8 | 245 | 2025-11-08 13:00:42 | MASTER- | (10h 51m 53.04s , +62d 04m 21.0s) | C | 40 | 17.5 | 293 | 2025-11-08 13:01:25 | MASTER-Tunka | (10h 52m 29.39s , +61d 59m 06.3s) | P- | 50 | 14.0 | 293 | 2025-11-08 13:01:25 | MASTER- | (10h 51m 53.02s , +62d 04m 22.7s) | C | 50 | 18.0 | 352 | 2025-11-08 13:02:18 | MASTER-Tunka | (10h 52m 29.17s , +61d 59m 07.7s) | P- | 60 | 14.1 | 352 | 2025-11-08 13:02:18 | MASTER- | (10h 51m 52.87s , +62d 04m 24.3s) | C | 60 | 17.7 | 416 | 2025-11-08 13:03:22 | MASTER-Tunka | (10h 52m 29.04s , +61d 59m 09.2s) | P- | 60 | 14.1 | 416 | 2025-11-08 13:03:22 | MASTER- | (10h 51m 52.69s , +62d 04m 26.3s) | C | 60 | 17.8 | 479 | 2025-11-08 13:04:26 | MASTER-Tunka | (10h 52m 28.87s , +61d 59m 10.6s) | P- | 60 | 14.1 | 479 | 2025-11-08 13:04:26 | MASTER- | (10h 51m 52.49s , +62d 04m 27.9s) | C | 60 | 17.8 | 543 | 2025-11-08 13:05:29 | MASTER-Tunka | (10h 52m 28.81s , +61d 59m 12.1s) | P- | 60 | 14.0 | 543 | 2025-11-08 13:05:30 | MASTER- | (10h 51m 52.28s , +62d 04m 29.4s) | C | 60 | 17.7 | 606 | 2025-11-08 13:06:33 | MASTER-Tunka | (10h 52m 28.72s , +61d 59m 13.7s) | P- | 60 | 14.0 | 606 | 2025-11-08 13:06:33 | MASTER- | (10h 51m 52.11s , +62d 04m 31.4s) | C | 60 | 17.6 | 670 | 2025-11-08 13:07:37 | MASTER-Tunka | (10h 52m 28.53s , +61d 59m 15.6s) | P- | 60 | 14.1 | 670 | 2025-11-08 13:07:37 | MASTER- | (10h 51m 51.90s , +62d 04m 32.7s) | C | 60 | 17.7 | 733 | 2025-11-08 13:08:40 | MASTER-Tunka | (10h 52m 28.39s , +61d 59m 18.2s) | P- | 60 | 14.0 | 733 | 2025-11-08 13:08:40 | MASTER- | (10h 51m 51.73s , +62d 04m 35.2s) | C | 60 | 17.7 | 797 | 2025-11-08 13:09:43 | MASTER-Tunka | (10h 52m 28.30s , +61d 59m 20.7s) | P- | 60 | 14.0 | 797 | 2025-11-08 13:09:43 | MASTER- | (10h 51m 51.55s , +62d 04m 37.6s) | C | 60 | 17.7 | 860 | 2025-11-08 13:10:46 | MASTER-Tunka | (10h 52m 28.10s , +61d 59m 22.2s) | P- | 60 | 13.9 | 860 | 2025-11-08 13:10:46 | MASTER- | (10h 51m 51.36s , +62d 04m 39.4s) | C | 60 | 17.6 | 924 | 2025-11-08 13:11:50 | MASTER-Tunka | (10h 52m 28.06s , +61d 59m 24.0s) | P- | 60 | 13.8 | 924 | 2025-11-08 13:11:50 | MASTER- | (10h 51m 51.13s , +62d 04m 41.3s) | C | 60 | 17.6 | 987 | 2025-11-08 13:12:53 | MASTER-Tunka | (10h 52m 27.80s , +61d 59m 25.9s) | P- | 60 | 13.9 | 987 | 2025-11-08 13:12:53 | MASTER- | (10h 51m 50.91s , +62d 04m 43.6s) | C | 60 | 17.7 | 1050 | 2025-11-08 13:13:57 | MASTER-Tunka | (10h 52m 27.59s , +61d 59m 28.2s) | P- | 60 | 14.0 | 1050 | 2025-11-08 13:13:57 | MASTER- | (10h 51m 50.72s , +62d 04m 45.4s) | C | 60 | 17.7 | 1114 | 2025-11-08 13:15:00 | MASTER-Tunka | (10h 52m 27.52s , +61d 59m 30.2s) | P- | 60 | 13.7 | 1114 | 2025-11-08 13:15:01 | MASTER- | (10h 51m 50.53s , +62d 04m 47.7s) | C | 60 | 17.7 | 1177 | 2025-11-08 13:16:04 | MASTER-Tunka | (10h 52m 27.42s , +61d 59m 31.9s) | P- | 60 | 13.5 | 1177 | 2025-11-08 13:16:04 | MASTER- | (10h 51m 50.36s , +62d 04m 49.5s) | C | 60 | 17.7 | 1241 | 2025-11-08 13:17:07 | MASTER-Tunka | (10h 52m 27.22s , +61d 59m 33.3s) | P- | 60 | 14.0 | 1241 | 2025-11-08 13:17:07 | MASTER- | (10h 51m 50.27s , +62d 04m 50.8s) | C | 60 | 17.6 | 1304 | 2025-11-08 13:18:11 | MASTER-Tunka | (10h 52m 27.00s , +61d 59m 34.6s) | P- | 60 | 14.0 | 1304 | 2025-11-08 13:18:11 | MASTER- | (10h 51m 50.06s , +62d 04m 52.4s) | C | 60 | 17.6 | 1368 | 2025-11-08 13:19:14 | MASTER-Tunka | (10h 52m 26.80s , +61d 59m 36.0s) | P- | 60 | 14.0 | 1368 | 2025-11-08 13:19:14 | MASTER- | (10h 51m 49.88s , +62d 04m 54.2s) | C | 60 | 17.6 | 1431 | 2025-11-08 13:20:18 | MASTER-Tunka | (10h 52m 26.66s , +61d 59m 37.8s) | P- | 60 | 14.0 | 1431 | 2025-11-08 13:20:18 | MASTER- | (10h 51m 49.72s , +62d 04m 56.1s) | C | 60 | 17.7 | 1495 | 2025-11-08 13:21:21 | MASTER-Tunka | (10h 52m 26.53s , +61d 59m 40.5s) | P- | 60 | 14.0 | 1495 | 2025-11-08 13:21:22 | MASTER- | (10h 51m 49.55s , +62d 04m 57.7s) | C | 60 | 17.6 | 1559 | 2025-11-08 13:22:25 | MASTER-Tunka | (10h 52m 26.30s , +61d 59m 41.9s) | P- | 60 | 14.0 | 1559 | 2025-11-08 13:22:25 | MASTER- | (10h 51m 49.37s , +62d 04m 59.7s) | C | 60 | 17.6 | 1622 | 2025-11-08 13:23:28 | MASTER-Tunka | (10h 52m 25.91s , +61d 59m 40.4s) | P- | 60 | 14.4 | 1622 | 2025-11-08 13:23:28 | MASTER- | (10h 51m 49.17s , +62d 05m 01.6s) | C | 60 | 17.5 | 1685 | 2025-11-08 13:24:32 | MASTER-Tunka | (10h 52m 26.42s , +61d 59m 43.8s) | P- | 60 | 14.3 | 1685 | 2025-11-08 13:24:32 | MASTER- | (10h 51m 48.97s , +62d 05m 03.7s) | C | 60 | 17.5 | 1749 | 2025-11-08 13:25:35 | MASTER-Tunka | (10h 52m 25.94s , +61d 59m 48.0s) | P- | 60 | 13.3 | 1749 | 2025-11-08 13:25:35 | MASTER- | (10h 51m 48.81s , +62d 05m 05.5s) | C | 60 | 17.6 | 1812 | 2025-11-08 13:26:39 | MASTER-Tunka | (10h 52m 25.57s , +61d 59m 48.7s) | P- | 60 | 13.8 | 1812 | 2025-11-08 13:26:39 | MASTER- | (10h 51m 48.58s , +62d 05m 07.2s) | C | 60 | 17.5 | 1876 | 2025-11-08 13:27:42 | MASTER-Tunka | (10h 52m 25.27s , +61d 59m 47.8s) | P- | 60 | 14.5 | 1876 | 2025-11-08 13:27:42 | MASTER- | (10h 51m 48.42s , +62d 05m 09.3s) | C | 60 | 17.6 | 1939 | 2025-11-08 13:28:45 | MASTER- | (10h 51m 48.26s , +62d 05m 11.4s) | C | 60 | 17.7 | 2003 | 2025-11-08 13:29:49 | MASTER-Tunka | (10h 52m 25.20s , +61d 59m 52.2s) | P- | 60 | 14.4 | 2003 | 2025-11-08 13:29:49 | MASTER- | (10h 51m 48.10s , +62d 05m 13.2s) | C | 60 | 17.6 | 2066 | 2025-11-08 13:30:53 | MASTER-Tunka | (10h 52m 25.03s , +61d 59m 53.5s) | P- | 60 | 14.4 | 2066 | 2025-11-08 13:30:53 | MASTER- | (10h 51m 47.91s , +62d 05m 15.6s) | C | 60 | 17.7 | 2129 | 2025-11-08 13:31:56 | MASTER-Tunka | (10h 52m 24.92s , +61d 59m 55.3s) | P- | 60 | 14.6 | 2129 | 2025-11-08 13:31:56 | MASTER- | (10h 51m 47.74s , +62d 05m 17.5s) | C | 60 | 17.8 | 2193 | 2025-11-08 13:32:59 | MASTER-Tunka | (10h 52m 24.62s , +61d 59m 58.2s) | P- | 60 | 14.6 | 2193 | 2025-11-08 13:32:59 | MASTER- | (10h 51m 47.50s , +62d 05m 19.7s) | C | 60 | 17.6 | 2256 | 2025-11-08 13:34:03 | MASTER-Tunka | (10h 52m 24.02s , +62d 00m 01.1s) | P- | 60 | 14.4 | 2256 | 2025-11-08 13:34:03 | MASTER- | (10h 51m 47.34s , +62d 05m 21.5s) | C | 60 | 17.7 | 2320 | 2025-11-08 13:35:06 | MASTER-Tunka | (10h 52m 24.16s , +62d 00m 04.2s) | P- | 60 | 14.0 | 2320 | 2025-11-08 13:35:06 | MASTER- | (10h 51m 47.12s , +62d 05m 22.9s) | C | 60 | 17.5 | 2383 | 2025-11-08 13:36:10 | MASTER-Tunka | (10h 52m 23.83s , +62d 00m 02.5s) | P- | 60 | 14.5 | 2383 | 2025-11-08 13:36:10 | MASTER- | (10h 51m 46.92s , +62d 05m 24.8s) | C | 60 | 17.7 | 2447 | 2025-11-08 13:37:13 | MASTER-Tunka | (10h 52m 23.41s , +62d 00m 06.4s) | P- | 60 | 14.4 | 2447 | 2025-11-08 13:37:13 | MASTER- | (10h 51m 46.70s , +62d 05m 26.9s) | C | 60 | 17.5 | 2510 | 2025-11-08 13:38:16 | MASTER-Tunka | (10h 52m 23.82s , +62d 00m 07.0s) | P- | 60 | 14.4 | 2510 | 2025-11-08 13:38:16 | MASTER- | (10h 51m 46.49s , +62d 05m 28.5s) | C | 60 | 17.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/42622. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40684] GRB 251102B: SVOM/GRM observation
by GCN Circulars 08 Nov '25

08 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42621 SUBJECT: GRB 251102B: SVOM/GRM observation DATE: 25/11/08 13:30:33 GMT FROM: yzh807926(a)163.com SVOM/GRM team: Zheng-Hang Yu, Chen-Wei Wang, Yue Huang, Shi-Jie Zheng, Shao-Lin Xiong, Shuang-Nan Zhang (IHEP) SVOM/ECLAIRs team: Sebastien Guillot (IRAP) Report on behalf of the SVOM team: SVOM/GRM was triggered on-ground by a burst GRB 251102B at 2025-11-02T21:15:53.000 UTC (T0), which is also detected by Fermi/GBM (Fermi GBM team, GCN #42533). With the event-by-event data downloaded through the X-band ground station, the GRM light curve shows that this burst consists of a single peak with a T90 of 3.5 +1.5/-1.0 s in the 15-5000 keV band. The SVOM/GRM light curve can be found here: https://www.bursthub.cn//admin/static/svgrb251102B.png In addition, the position of this burst, as determined by Fermi/GBM (RA= 110.6, DEC= -69.7, GCN#42533), is located at about 83 degrees from the SVOM optical axis, which is outside the ECLAIRs field of view. With this localization, the time-averaged spectrum from T0-6 to T0+4 s is best fitted by a power law function. The power law index is -1.98 +0.01/-0.03. The event fluence (10-1000 keV) in this time interval is (1.25 +0.16/-0.15)E-6 erg/cm^2. The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. GRM is developed by the Institute of High Energy Physics (IHEP) of CAS. The SVOM point of contact for this burst is: Zheng-Hang Yu(IHEP)(zhyu(a)ihep.ac.cn) View this GCN Circular online at https://gcn.nasa.gov/circulars/42621. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40683] Fermi Gamma-ray Burst Monitor trigger 784279167/251108305 is not a GRB
by GCN Circulars 08 Nov '25

08 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42620 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 784279167/251108305 is not a GRB DATE: 25/11/08 12:01:17 GMT FROM: A. Holzmann Airasca at University of Trento and INFN Bari <a.holzmannairasca(a)unitn.it> A. Holzmann Airasca (UniTrento and INFN Bari) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 784279167/251108305 at 07:19:22.22 UT on 08 November 2025, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to local particles." View this GCN Circular online at https://gcn.nasa.gov/circulars/42620. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40682] LIGO/Virgo/KAGRA S251108dn: Identification of a GW compact binary merger candidate
by GCN Circulars 08 Nov '25

08 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42619 SUBJECT: LIGO/Virgo/KAGRA S251108dn: Identification of a GW compact binary merger candidate DATE: 25/11/08 11:42:05 GMT FROM: FRANCESCO STOLZI at Unisi <stolzi3(a)unisi.it> The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We identified the compact binary merger candidate S251108dn during real-time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2025-11-08 10:32:43.578 UTC (GPS time: 1446633181.578). The candidate was found by the Aframe [1], cWB BBH [2], GstLAL [3], MBTA [4], PyCBC Live [5], and SPIIR [6] analysis pipelines. S251108dn is an event of interest because its false alarm rate, as estimated by the online analysis, is 9.4e-18 Hz, or about one in 1e10 years. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S251108dn The classification of the GW signal, in order of descending probability, is BBH (>99%), NSBH (<1%), Terrestrial (<1%), or BNS (<1%). Noise transients (glitches) were present in the LIGO Livingston and Virgo detector data within two seconds of the event time, which may affect the parameters or the significance of the candidate. Assuming the candidate is astrophysical in origin, the probability that at least one of the compact objects is consistent with a neutron star mass (HasNS) is <1%. [7] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [7] Both HasNS and HasRemnant consider the support of several neutron star equations of state for maximum neutron star mass. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassGap) is 2%. The source chirp mass falls with highest probability in the bin (5.5, 11.0) solar masses, assuming the candidate is astrophysical in origin. Two sky maps are available at this time and can be retrieved from the GraceDB event page: * bayestar.multiorder.fits,0, an initial localization generated by BAYESTAR [8], distributed via GCN and SCiMMA notices about 26 seconds after the candidate event time. * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [8], distributed via GCN and SCiMMA notices about 5 minutes after the candidate event time. The preferred sky map at this time is bayestar.multiorder.fits,1. For the bayestar.multiorder.fits,1 sky map, the 90% credible region is 697 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1165 +/- 309 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Marx et al. PRD 111, 042010 (2025) doi:10.1103/PhysRevD.111.042010 [2] T. Mishra et al. PRD 105, 083018 (2022) doi:10.1103/PhysRevD.105.083018 [3] Tsukada et al. PRD 108, 043004 (2023) doi:10.1103/PhysRevD.108.043004 and Ewing et al. PRD 109, 042008 (2024) doi:10.1103/PhysRevD.109.042008 [4] Alléné et al. CQG 42, 105009 (2025) doi:10.1088/1361-6382/add234 [5] Dal Canton et al. ApJ 923, 254 (2021) doi:10.3847/1538-4357/ac2f9a [6] Chu et al. PRD 105, 024023 (2022) doi:10.1103/PhysRevD.105.024023 [7] Chatterjee et al. ApJ 896, 54 (2020) doi:10.3847/1538-4357/ab8dbe [8] Singer & Price PRD 93, 024013 (2016) doi:10.1103/PhysRevD.93.024013 View this GCN Circular online at https://gcn.nasa.gov/circulars/42619. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40681] The EP-WXT trigger 01709248051 is likely a flaring star
by GCN Circulars 08 Nov '25

08 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42618 SUBJECT: The EP-WXT trigger 01709248051 is likely a flaring star DATE: 25/11/08 01:10:53 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> Y. H. Cheng (YNU), C. Y. Dai (NJU), R. D. Liang, W. Chen, H. Sun (NAO,CAS) on behalf of the Einstein Probe (EP) team: The EP-WXT trigger 01709248051 at the time of 2025-11-08T00:00:49, is likely a stellar flare associated with the High Proper Motion Star [GBA2007] 680. The estimated flux of the flare is around 6 x 10^(-11) erg/s/cm^2 in 0.5-4 keV, corresponding to an X-ray luminosity of around 5.1 x 10^(31) erg/s. Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics). View this GCN Circular online at https://gcn.nasa.gov/circulars/42618. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40680] SVOM GRB251106.83: Global MASTER-Net observations report
by GCN Circulars 07 Nov '25

07 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42617 SUBJECT: SVOM GRB251106.83: Global MASTER-Net observations report DATE: 25/11/07 19:56:30 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)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-Kislovodsk robotic telescope [1] located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the SVOM GRB251106.83 (trigger No 1762458982,15h 39m 01.49s , +63d 21m 52.9s, R=0.1547) errorbox 57 sec after notice time and 1565 sec after trigger time at 2025-11-06 20:22:27 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 73 deg. The sun altitude is -62.3 deg. The galactic latitude b = 45 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3034620 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 1626 | 2025-11-06 20:22:27 | MASTER-Kislovodsk | (15h 37m 28.85s , +63d 06m 03.4s) | P- | 120 | 15.6 | 1766 | 2025-11-06 20:24:47 | MASTER-Kislovodsk | (15h 37m 29.81s , +63d 05m 56.6s) | P- | 120 | 15.6 | 1766 | 2025-11-06 20:24:47 | MASTER-Kislovodsk | (15h 37m 42.69s , +63d 28m 24.2s) | P| | 120 | 17.2 | 1905 | 2025-11-06 20:27:07 | MASTER-Kislovodsk | (15h 37m 30.71s , +63d 05m 51.6s) | P- | 120 | 15.5 | 1905 | 2025-11-06 20:27:07 | MASTER-Kislovodsk | (15h 37m 43.57s , +63d 28m 18.7s) | P| | 120 | 17.3 | 2045 | 2025-11-06 20:29:27 | MASTER-Kislovodsk | (15h 37m 31.56s , +63d 05m 46.7s) | P- | 120 | 15.6 | 2045 | 2025-11-06 20:29:27 | MASTER-Kislovodsk | (15h 37m 44.37s , +63d 28m 13.8s) | P| | 120 | 17.2 | 2155 | 2025-11-06 20:31:47 | MASTER-Kislovodsk | (15h 37m 25.48s , +63d 04m 04.1s) | C | 60 | 17.0 | 2275 | 2025-11-06 20:31:47 | MASTER-Kislovodsk | (15h 37m 25.50s , +63d 04m 04.1s) | C | 300 | 17.5 | Coadd 2155 | 2025-11-06 20:31:47 | MASTER-Kislovodsk | (15h 37m 38.06s , +63d 26m 36.1s) | C | 60 | 17.4 | 2873 | 2025-11-06 20:43:45 | MASTER-Kislovodsk | (15h 36m 59.84s , +63d 06m 24.9s) | C | 60 | 17.0 | 2933 | 2025-11-06 20:43:45 | MASTER-Kislovodsk | (15h 36m 59.83s , +63d 06m 24.9s) | C | 180 | 17.8 | Coadd 2873 | 2025-11-06 20:43:45 | MASTER-Kislovodsk | (15h 37m 12.09s , +63d 29m 02.0s) | C | 60 | 17.4 | 2953 | 2025-11-06 20:45:05 | MASTER-Kislovodsk | (15h 37m 04.06s , +63d 05m 20.5s) | C | 60 | 17.1 | 2953 | 2025-11-06 20:45:05 | MASTER-Kislovodsk | (15h 37m 16.46s , +63d 27m 56.8s) | C | 60 | 17.5 | 3033 | 2025-11-06 20:46:25 | MASTER-Kislovodsk | (15h 36m 58.81s , +63d 04m 17.3s) | C | 60 | 17.0 | 3033 | 2025-11-06 20:46:25 | MASTER-Kislovodsk | (15h 37m 11.34s , +63d 26m 52.9s) | C | 60 | 17.4 | 3143 | 2025-11-06 20:47:45 | MASTER-Kislovodsk | (15h 37m 04.62s , +63d 04m 30.1s) | C | 120 | 17.3 | 3144 | 2025-11-06 20:47:45 | MASTER-Kislovodsk | (15h 37m 17.42s , +63d 27m 05.1s) | C | 120 | 17.4 | 3305 | 2025-11-06 20:50:26 | MASTER-Kislovodsk | (15h 37m 04.51s , +63d 05m 55.6s) | C | 120 | 17.3 | 3305 | 2025-11-06 20:50:26 | MASTER-Kislovodsk | (15h 37m 17.54s , +63d 28m 30.4s) | C | 120 | 17.5 | 3444 | 2025-11-06 20:52:46 | MASTER-Kislovodsk | (15h 37m 05.48s , +63d 04m 10.8s) | C | 120 | 17.2 | 3564 | 2025-11-06 20:52:46 | MASTER-Kislovodsk | (15h 37m 05.48s , +63d 04m 10.8s) | C | 360 | 17.9 | Coadd 3444 | 2025-11-06 20:52:46 | MASTER-Kislovodsk | (15h 37m 18.70s , +63d 26m 45.1s) | C | 120 | 17.5 | 3584 | 2025-11-06 20:55:05 | MASTER-Kislovodsk | (15h 37m 07.60s , +63d 05m 54.6s) | C | 120 | 17.2 | 3584 | 2025-11-06 20:55:05 | MASTER-Kislovodsk | (15h 37m 20.97s , +63d 28m 28.6s) | C | 120 | 17.4 | 3724 | 2025-11-06 20:57:25 | MASTER-Kislovodsk | (15h 37m 04.73s , +63d 05m 01.2s) | C | 120 | 17.2 | 3724 | 2025-11-06 20:57:26 | MASTER-Kislovodsk | (15h 37m 18.15s , +63d 27m 35.0s) | C | 120 | 17.4 | 3864 | 2025-11-06 20:59:45 | MASTER-Kislovodsk | (15h 37m 04.57s , +63d 05m 58.7s) | C | 120 | 17.1 | 3924 | 2025-11-06 20:59:45 | MASTER-Kislovodsk | (15h 37m 04.57s , +63d 05m 58.8s) | C | 240 | 17.5 | Coadd 3864 | 2025-11-06 20:59:45 | MASTER-Kislovodsk | (15h 37m 18.12s , +63d 28m 32.3s) | C | 120 | 17.4 | 3974 | 2025-11-06 21:02:05 | MASTER-Kislovodsk | (15h 37m 10.31s , +63d 04m 57.0s) | C | 60 | 16.8 | 3974 | 2025-11-06 21:02:05 | MASTER-Kislovodsk | (15h 37m 23.89s , +63d 27m 30.6s) | C | 60 | 17.2 | 4054 | 2025-11-06 21:03:25 | MASTER-Kislovodsk | (15h 37m 05.87s , +63d 03m 55.5s) | C | 60 | 16.8 | 4054 | 2025-11-06 21:03:25 | MASTER-Kislovodsk | (15h 37m 19.52s , +63d 26m 29.2s) | C | 60 | 17.2 | 4134 | 2025-11-06 21:04:45 | MASTER-Kislovodsk | (15h 37m 13.13s , +63d 04m 18.9s) | C | 60 | 16.8 | 4194 | 2025-11-06 21:04:45 | MASTER-Kislovodsk | (15h 37m 13.12s , +63d 04m 18.9s) | C | 180 | 17.3 | Coadd 4134 | 2025-11-06 21:04:45 | MASTER-Kislovodsk | (15h 37m 26.81s , +63d 26m 52.7s) | C | 60 | 17.1 | 4214 | 2025-11-06 21:06:05 | MASTER-Kislovodsk | (15h 37m 10.83s , +63d 05m 52.4s) | C | 60 | 16.6 | 4214 | 2025-11-06 21:06:05 | MASTER-Kislovodsk | (15h 37m 24.56s , +63d 28m 26.3s) | C | 60 | 16.9 | 4294 | 2025-11-06 21:07:25 | MASTER-Kislovodsk | (15h 37m 24.19s , +63d 26m 54.6s) | C | 60 | 16.9 | 4294 | 2025-11-06 21:07:25 | MASTER-Kislovodsk | (15h 37m 10.45s , +63d 04m 20.8s) | C | 60 | 16.4 | 4373 | 2025-11-06 21:08:45 | MASTER-Kislovodsk | (15h 37m 28.61s , +63d 28m 10.5s) | C | 60 | 16.8 | 4373 | 2025-11-06 21:08:45 | MASTER-Kislovodsk | (15h 37m 14.90s , +63d 05m 36.8s) | C | 60 | 16.5 | 4433 | 2025-11-06 21:08:45 | MASTER-Kislovodsk | (15h 37m 14.90s , +63d 05m 36.9s) | C | 180 | 17.0 | Coadd 4453 | 2025-11-06 21:10:04 | MASTER-Kislovodsk | (15h 37m 22.44s , +63d 27m 24.6s) | C | 60 | 16.7 | 4453 | 2025-11-06 21:10:04 | MASTER-Kislovodsk | (15h 37m 08.69s , +63d 04m 51.0s) | C | 60 | 16.4 | 4533 | 2025-11-06 21:11:24 | MASTER-Kislovodsk | (15h 37m 24.05s , +63d 28m 23.8s) | C | 60 | 16.7 | 4533 | 2025-11-06 21:11:24 | MASTER-Kislovodsk | (15h 37m 10.40s , +63d 05m 50.5s) | C | 60 | 16.3 | 4718 | 2025-11-06 21:14:29 | MASTER-Kislovodsk | (15h 37m 24.27s , +63d 28m 40.2s) | C | 60 | 16.6 | 4718 | 2025-11-06 21:14:29 | MASTER-Kislovodsk | (15h 37m 08.78s , +63d 05m 48.3s) | C | 60 | 16.3 | 4778 | 2025-11-06 21:14:29 | MASTER-Kislovodsk | (15h 37m 08.78s , +63d 05m 48.4s) | C | 180 | 17.0 | Coadd 4797 | 2025-11-06 21:15:49 | MASTER-Kislovodsk | (15h 37m 30.85s , +63d 27m 38.6s) | C | 60 | 16.6 | 4797 | 2025-11-06 21:15:49 | MASTER-Kislovodsk | (15h 37m 15.47s , +63d 04m 46.6s) | C | 60 | 16.2 | 4877 | 2025-11-06 21:17:09 | MASTER-Kislovodsk | (15h 37m 09.03s , +63d 03m 45.3s) | C | 60 | 16.1 | 4877 | 2025-11-06 21:17:09 | MASTER-Kislovodsk | (15h 37m 24.31s , +63d 26m 37.5s) | C | 60 | 16.4 | 4957 | 2025-11-06 21:18:28 | MASTER-Kislovodsk | (15h 37m 31.56s , +63d 27m 02.7s) | C | 60 | 16.4 | 4957 | 2025-11-06 21:18:28 | MASTER-Kislovodsk | (15h 37m 16.46s , +63d 04m 10.3s) | C | 60 | 16.1 | 5077 | 2025-11-06 21:18:28 | MASTER-Kislovodsk | (15h 37m 16.46s , +63d 04m 10.3s) | C | 300 | 17.1 | Coadd 5067 | 2025-11-06 21:19:48 | MASTER-Kislovodsk | (15h 37m 29.80s , +63d 28m 18.5s) | C | 120 | 16.6 | 5067 | 2025-11-06 21:19:48 | MASTER-Kislovodsk | (15h 37m 14.41s , +63d 05m 26.3s) | C | 120 | 16.5 | 5207 | 2025-11-06 21:22:09 | MASTER-Kislovodsk | (15h 37m 30.85s , +63d 27m 02.1s) | C | 120 | 16.7 | 5208 | 2025-11-06 21:22:09 | MASTER-Kislovodsk | (15h 37m 15.48s , +63d 04m 10.2s) | C | 120 | 16.5 | 5347 | 2025-11-06 21:24:28 | MASTER-Kislovodsk | (15h 37m 35.95s , +63d 28m 23.2s) | C | 120 | 16.8 | 5347 | 2025-11-06 21:24:28 | MASTER-Kislovodsk | (15h 37m 20.33s , +63d 05m 31.7s) | C | 120 | 16.6 | 5467 | 2025-11-06 21:24:28 | MASTER-Kislovodsk | (15h 37m 20.33s , +63d 05m 31.7s) | C | 360 | 17.3 | Coadd 5487 | 2025-11-06 21:26:48 | MASTER-Kislovodsk | (15h 37m 30.28s , +63d 27m 30.2s) | C | 120 | 17.0 | 5487 | 2025-11-06 21:26:48 | MASTER-Kislovodsk | (15h 37m 14.65s , +63d 04m 38.6s) | C | 120 | 16.7 | 5627 | 2025-11-06 21:29:08 | MASTER-Kislovodsk | (15h 37m 30.44s , +63d 28m 29.3s) | C | 120 | 17.0 | 5627 | 2025-11-06 21:29:08 | MASTER-Kislovodsk | (15h 37m 14.73s , +63d 05m 38.3s) | C | 120 | 16.8 | 5767 | 2025-11-06 21:31:29 | MASTER-Kislovodsk | (15h 37m 22.89s , +63d 04m 37.5s) | C | 120 | 16.9 | 5887 | 2025-11-06 21:31:29 | MASTER-Kislovodsk | (15h 37m 22.90s , +63d 04m 37.6s) | C | 360 | 17.5 | Coadd 5767 | 2025-11-06 21:31:29 | MASTER-Kislovodsk | (15h 37m 38.60s , +63d 27m 28.5s) | C | 120 | 17.3 | 5907 | 2025-11-06 21:33:48 | MASTER-Kislovodsk | (15h 37m 34.50s , +63d 26m 28.0s) | C | 120 | 17.1 | 5907 | 2025-11-06 21:33:48 | MASTER-Kislovodsk | (15h 37m 18.97s , +63d 03m 36.8s) | C | 120 | 16.9 | 6047 | 2025-11-06 21:36:08 | MASTER-Kislovodsk | (15h 37m 41.42s , +63d 26m 50.4s) | C | 120 | 17.1 | 6047 | 2025-11-06 21:36:08 | MASTER-Kislovodsk | (15h 37m 25.84s , +63d 03m 59.8s) | C | 120 | 16.9 | 6187 | 2025-11-06 21:38:28 | MASTER-Kislovodsk | (15h 37m 39.82s , +63d 28m 06.3s) | C | 120 | 17.1 | 6187 | 2025-11-06 21:38:28 | MASTER-Kislovodsk | (15h 37m 24.04s , +63d 05m 16.2s) | C | 120 | 16.9 | 6307 | 2025-11-06 21:38:28 | MASTER-Kislovodsk | (15h 37m 24.05s , +63d 05m 16.2s) | C | 360 | 17.6 | Coadd 6326 | 2025-11-06 21:40:48 | MASTER-Kislovodsk | (15h 37m 24.02s , +63d 03m 41.3s) | C | 120 | 16.9 | 6326 | 2025-11-06 21:40:48 | MASTER-Kislovodsk | (15h 37m 40.06s , +63d 26m 31.0s) | C | 120 | 17.0 | 6466 | 2025-11-06 21:43:07 | MASTER-Kislovodsk | (15h 37m 44.13s , +63d 27m 56.6s) | C | 120 | 17.0 | 6466 | 2025-11-06 21:43:07 | MASTER-Kislovodsk | (15h 37m 27.84s , +63d 05m 06.8s) | C | 120 | 17.0 | 6606 | 2025-11-06 21:45:27 | MASTER-Kislovodsk | (15h 36m 43.61s , +62d 51m 28.9s) | C | 120 | 16.5 | 6606 | 2025-11-06 21:45:27 | MASTER-Kislovodsk | (15h 36m 34.62s , +63d 14m 55.2s) | C | 120 | 16.4 | 6746 | 2025-11-06 21:47:47 | MASTER-Kislovodsk | (15h 36m 43.64s , +62d 52m 15.3s) | C | 120 | 17.0 | 6746 | 2025-11-06 21:47:47 | MASTER-Kislovodsk | (15h 36m 34.72s , +63d 15m 41.8s) | C | 120 | 16.8 | 6886 | 2025-11-06 21:50:07 | MASTER-Kislovodsk | (15h 36m 52.34s , +62d 51m 06.6s) | C | 120 | 17.1 | 6886 | 2025-11-06 21:50:07 | MASTER-Kislovodsk | (15h 36m 43.50s , +63d 14m 32.6s) | C | 120 | 16.9 | 7026 | 2025-11-06 21:52:27 | MASTER-Kislovodsk | (15h 36m 46.55s , +62d 50m 00.4s) | C | 120 | 17.1 | 7026 | 2025-11-06 21:52:27 | MASTER-Kislovodsk | (15h 36m 37.62s , +63d 13m 26.3s) | C | 120 | 16.9 | 7146 | 2025-11-06 21:52:27 | MASTER-Kislovodsk | (15h 36m 37.62s , +63d 13m 26.3s) | C | 360 | 17.6 | Coadd 7166 | 2025-11-06 21:54:47 | MASTER-Kislovodsk | (15h 36m 53.63s , +62d 50m 22.6s) | C | 120 | 17.1 | 7166 | 2025-11-06 21:54:47 | MASTER-Kislovodsk | (15h 36m 44.73s , +63d 13m 48.7s) | C | 120 | 16.9 | 7306 | 2025-11-06 21:57:07 | MASTER-Kislovodsk | (15h 36m 43.81s , +63d 14m 57.1s) | C | 120 | 16.9 | 7306 | 2025-11-06 21:57:07 | MASTER-Kislovodsk | (15h 36m 52.47s , +62d 51m 30.6s) | C | 120 | 17.4 | 7446 | 2025-11-06 21:59:27 | MASTER-Kislovodsk | (15h 36m 53.33s , +62d 50m 03.7s) | C | 120 | 17.4 | 7446 | 2025-11-06 21:59:27 | MASTER-Kislovodsk | (15h 36m 44.93s , +63d 13m 30.7s) | C | 120 | 16.9 | 7506 | 2025-11-06 21:59:27 | MASTER-Kislovodsk | (15h 36m 44.93s , +63d 13m 30.7s) | C | 240 | 17.4 | Coadd 7555 | 2025-11-06 22:01:47 | MASTER-Kislovodsk | (15h 36m 57.12s , +62d 51m 25.2s) | C | 60 | 17.1 | 7555 | 2025-11-06 22:01:47 | MASTER-Kislovodsk | (15h 36m 48.66s , +63d 14m 52.3s) | C | 60 | 16.8 | 7635 | 2025-11-06 22:03:07 | MASTER-Kislovodsk | (15h 36m 50.86s , +62d 50m 51.1s) | C | 60 | 17.1 | 7635 | 2025-11-06 22:03:07 | MASTER-Kislovodsk | (15h 36m 42.49s , +63d 14m 18.3s) | C | 60 | 16.7 | 7715 | 2025-11-06 22:04:26 | MASTER-Kislovodsk | (15h 36m 52.49s , +62d 51m 51.8s) | C | 60 | 17.1 | 7715 | 2025-11-06 22:04:26 | MASTER-Kislovodsk | (15h 36m 44.22s , +63d 15m 18.9s) | C | 60 | 16.7 | 7775 | 2025-11-06 22:04:26 | MASTER-Kislovodsk | (15h 36m 44.21s , +63d 15m 18.9s) | C | 180 | 17.4 | Coadd 7795 | 2025-11-06 22:05:46 | MASTER-Kislovodsk | (15h 36m 50.63s , +63d 14m 18.7s) | C | 60 | 16.8 | 7795 | 2025-11-06 22:05:46 | MASTER-Kislovodsk | (15h 36m 58.82s , +62d 50m 51.4s) | C | 60 | 17.1 | 7874 | 2025-11-06 22:07:05 | MASTER-Kislovodsk | (15h 36m 53.69s , +62d 49m 51.8s) | C | 60 | 17.1 | 7874 | 2025-11-06 22:07:05 | MASTER-Kislovodsk | (15h 36m 45.62s , +63d 13m 19.1s) | C | 60 | 16.6 | 7954 | 2025-11-06 22:08:25 | MASTER-Kislovodsk | (15h 36m 51.15s , +63d 13m 49.4s) | C | 60 | 16.6 | 8014 | 2025-11-06 22:08:25 | MASTER-Kislovodsk | (15h 36m 51.15s , +63d 13m 49.3s) | C | 180 | 17.4 | Coadd 7954 | 2025-11-06 22:08:25 | MASTER-Kislovodsk | (15h 36m 59.17s , +62d 50m 21.8s) | C | 60 | 17.0 | 8034 | 2025-11-06 22:09:45 | MASTER-Kislovodsk | (15h 36m 48.62s , +63d 15m 03.0s) | C | 60 | 16.7 | 8034 | 2025-11-06 22:09:45 | MASTER-Kislovodsk | (15h 36m 56.65s , +62d 51m 35.8s) | C | 60 | 17.1 | 8113 | 2025-11-06 22:11:05 | MASTER-Kislovodsk | (15h 36m 58.21s , +62d 50m 14.3s) | C | 60 | 16.9 | 8113 | 2025-11-06 22:11:05 | MASTER-Kislovodsk | (15h 36m 50.21s , +63d 13m 41.8s) | C | 60 | 16.6 | 8193 | 2025-11-06 22:12:24 | MASTER-Kislovodsk | (15h 36m 53.00s , +63d 15m 14.2s) | C | 60 | 16.6 | 8253 | 2025-11-06 22:12:24 | MASTER-Kislovodsk | (15h 36m 52.99s , +63d 15m 14.2s) | C | 180 | 17.4 | Coadd 8193 | 2025-11-06 22:12:24 | MASTER-Kislovodsk | (15h 37m 00.97s , +62d 51m 46.9s) | C | 60 | 16.9 | 8273 | 2025-11-06 22:13:44 | MASTER-Kislovodsk | (15h 36m 47.55s , +63d 14m 22.9s) | C | 60 | 16.5 | 8273 | 2025-11-06 22:13:44 | MASTER-Kislovodsk | (15h 36m 55.50s , +62d 50m 55.9s) | C | 60 | 16.9 | 8353 | 2025-11-06 22:15:04 | MASTER-Kislovodsk | (15h 36m 47.15s , +63d 15m 23.3s) | C | 60 | 16.5 | 8353 | 2025-11-06 22:15:04 | MASTER-Kislovodsk | (15h 36m 55.10s , +62d 51m 56.7s) | C | 60 | 16.8 | 8433 | 2025-11-06 22:16:24 | MASTER-Kislovodsk | (15h 36m 53.72s , +63d 14m 23.2s) | C | 60 | 16.4 | 8433 | 2025-11-06 22:16:24 | MASTER-Kislovodsk | (15h 37m 01.82s , +62d 50m 56.9s) | C | 60 | 16.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/42617. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40679] LIGO/Virgo/KAGRA S251105aj: Updated Sky localization
by GCN Circulars 07 Nov '25

07 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42616 SUBJECT: LIGO/Virgo/KAGRA S251105aj: Updated Sky localization DATE: 25/11/07 17:23:04 GMT FROM: Lorenzo Pompili at Max Planck Institute for Gravitational Physics <lorenzo.pompili(a)aei.mpg.de> The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We have conducted further analysis of the LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) data around the time of the compact binary merger (CBC) candidate S251105aj (GCN Circular 42587). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN and SCiMMA notices, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/superevents/S251105aj For the Bilby.multiorder.fits,0 sky map, the 90% credible region is 376 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2483 +/- 735 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Ashton et al. ApJS 241, 27 (2019) doi:10.3847/1538-4365/ab06fc and Morisaki et al. PRD 108, 123040 (2023) doi:10.1103/PhysRevD.108.123040 View this GCN Circular online at https://gcn.nasa.gov/circulars/42616. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40678] LIGO/Virgo/KAGRA S251103f: Updated Sky localization
by GCN Circulars 07 Nov '25

07 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42615 SUBJECT: LIGO/Virgo/KAGRA S251103f: Updated Sky localization DATE: 25/11/07 17:19:59 GMT FROM: Lorenzo Pompili at Max Planck Institute for Gravitational Physics <lorenzo.pompili(a)aei.mpg.de> The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We have conducted further analysis of the LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) data around the time of the compact binary merger (CBC) candidate S251103f (GCN Circular 42564). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.multiorder.fits,0, distributed via GCN and SCiMMA notices, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/superevents/S251103f For the Bilby.multiorder.fits,0 sky map, the 90% credible region is 757 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2158 +/- 537 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Ashton et al. ApJS 241, 27 (2019) doi:10.3847/1538-4365/ab06fc and Morisaki et al. PRD 108, 123040 (2023) doi:10.1103/PhysRevD.108.123040 View this GCN Circular online at https://gcn.nasa.gov/circulars/42615. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 40677] IPN triangulation of GRB 251105B (possible sGRB with EE)
by GCN Circulars 07 Nov '25

07 Nov '25

TITLE: GCN CIRCULAR NUMBER: 42614 SUBJECT: IPN triangulation of GRB 251105B (possible sGRB with EE) DATE: 25/11/07 15:12:08 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin(a)mail.ioffe.ru> A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars Odyssey team, D. Svinkin, D. Frederiks, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, Y. Zhang, C. Wang, S. Xiong, J. Wei, and B. Cordier on behalf of the SVOM-GRM team, A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report: The possible short-duration GRB with extended emission GRB 251105B (SVOM-GRM detection: Wang et al., GCN 42586; Fermi-GBM detection: Hamburg eat al., GCN 42589; AstroSat-CZTI detection: Harsha et al., GCN 42591) was detected by SVOM (GRM), Konus-Wind, Fermi (GBM), AstroSat (CZTI), and Mars-Odyssey (HEND) at about 3514 s UT (00:58:34). We have triangulated it to a preliminary, 3 sigma error box whose coordinates are: --------------------------------------------- RA(2000), deg Dec(2000), deg --------------------------------------------- Center: 277.814 (18h 31m 15s) +9.028 ( +9d 01' 39") Corners: 277.022 (18h 28m 05s) +9.993 ( +9d 59' 36") 277.294 (18h 29m 11s) +9.729 ( +9d 43' 46") 278.607 (18h 34m 26s) +8.012 ( +8d 00' 43") 278.333 (18h 33m 20s) +8.303 ( +8d 18' 10") --------------------------------------------- The error box area is 362 sq. arcmin, and its maximum dimension is 2.5 deg (the minimum one is 3 arcmin). The Sun distance was 62 deg. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB251105_T03511/IPN The HEALPix triangulation map is the multi-order HEALPix in units of probability density. The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular. View this GCN Circular online at https://gcn.nasa.gov/circulars/42614. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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