[vsnet-grb-info 37267] IceCube Alert 250207.09: Global MASTER-Net observations report

TITLE: GCN CIRCULAR NUMBER: 39257 SUBJECT: IceCube Alert 250207.09: Global MASTER-Net observations report DATE: 25/02/09 20:40:02 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru

V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, 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. 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the IceCube Alert 250207.09 (trigger No 78196104,08h 41m 03.60s , +17d 02m 34.8s, R=4.44) errorbox 14 sec after notice time and 68 sec after trigger time at 2025-02-07 02:09:04 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 75 deg. The sun altitude is -23.3 deg.

MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the IceCube Alert 250207.09 errorbox 42255 sec after notice time and 42309 sec after trigger time at 2025-02-07 13:53:05 UT, with upper limit up to 19.2 mag. The observations began at zenith distance = 45 deg. The sun altitude is -35.4 deg.

The galactic latitude b = 32 deg., longitude l = 209 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2770114

We obtain a following upper limits.

Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________

74 | 2025-02-07 02:09:04 | MASTER-SAAO | (08h 40m 36.36s , +17d 03m 01.6s) | C | 10 | 17.3 | 94 | 2025-02-07 02:09:04 | MASTER-SAAO | (08h 40m 36.36s , +17d 03m 01.5s) | C | 50 | 18.3 | Coadd 108 | 2025-02-07 02:09:33 | MASTER-SAAO | (08h 40m 36.80s , +17d 03m 02.9s) | C | 20 | 17.9 | 147 | 2025-02-07 02:10:12 | MASTER-SAAO | (08h 40m 37.31s , +17d 03m 04.8s) | C | 20 | 17.8 | 191 | 2025-02-07 02:10:51 | MASTER-SAAO | (08h 40m 37.89s , +17d 03m 06.7s) | C | 30 | 18.0 | 245 | 2025-02-07 02:11:40 | MASTER-SAAO | (08h 40m 38.66s , +17d 03m 09.0s) | C | 40 | 18.1 | 309 | 2025-02-07 02:12:39 | MASTER-SAAO | (08h 40m 39.56s , +17d 03m 11.7s) | C | 50 | 18.1 | 383 | 2025-02-07 02:13:48 | MASTER-SAAO | (08h 40m 40.66s , +17d 03m 14.3s) | C | 60 | 18.1 | 462 | 2025-02-07 02:15:06 | MASTER-SAAO | (08h 40m 41.81s , +17d 03m 17.3s) | C | 60 | 18.1 | 541 | 2025-02-07 02:16:26 | MASTER-SAAO | (08h 40m 43.01s , +17d 03m 20.5s) | C | 60 | 18.0 | 620 | 2025-02-07 02:17:45 | MASTER-SAAO | (08h 40m 44.27s , +17d 03m 23.4s) | C | 60 | 18.0 | 699 | 2025-02-07 02:19:04 | MASTER-SAAO | (08h 40m 45.56s , +17d 03m 26.6s) | C | 60 | 17.9 | 778 | 2025-02-07 02:20:23 | MASTER-SAAO | (08h 40m 46.85s , +17d 03m 29.8s) | C | 60 | 17.9 | 857 | 2025-02-07 02:21:42 | MASTER-SAAO | (08h 40m 48.22s , +17d 03m 32.8s) | C | 60 | 17.9 | 936 | 2025-02-07 02:23:01 | MASTER-SAAO | (08h 40m 49.59s , +17d 03m 36.0s) | C | 60 | 17.8 | 1015 | 2025-02-07 02:24:20 | MASTER-SAAO | (08h 40m 51.02s , +17d 03m 38.9s) | C | 60 | 17.8 | 1094 | 2025-02-07 02:25:39 | MASTER-SAAO | (08h 40m 52.46s , +17d 03m 42.2s) | C | 60 | 17.7 | 1173 | 2025-02-07 02:26:58 | MASTER-SAAO | (08h 40m 53.93s , +17d 03m 45.3s) | C | 60 | 17.7 | 1252 | 2025-02-07 02:28:17 | MASTER-SAAO | (08h 40m 55.47s , +17d 03m 48.3s) | C | 60 | 17.6 | 1332 | 2025-02-07 02:29:36 | MASTER-SAAO | (08h 40m 57.02s , +17d 03m 51.7s) | C | 60 | 17.7 | 1411 | 2025-02-07 02:30:56 | MASTER-SAAO | (08h 40m 58.60s , +17d 03m 55.0s) | C | 60 | 17.6 | 1490 | 2025-02-07 02:32:15 | MASTER-SAAO | (08h 41m 00.22s , +17d 03m 58.3s) | C | 60 | 17.5 | 1569 | 2025-02-07 02:33:34 | MASTER-SAAO | (08h 41m 00.88s , +17d 04m 01.8s) | C | 60 | 18.3 | 1629 | 2025-02-07 02:33:34 | MASTER-SAAO | (08h 41m 00.88s , +17d 04m 01.8s) | C | 180 | 19.0 | Coadd 1649 | 2025-02-07 02:34:54 | MASTER-SAAO | (08h 41m 00.70s , +17d 04m 05.2s) | C | 60 | 18.3 | 1728 | 2025-02-07 02:36:12 | MASTER-SAAO | (08h 41m 00.53s , +17d 04m 08.4s) | C | 60 | 18.3 | 1807 | 2025-02-07 02:37:32 | MASTER-SAAO | (08h 41m 00.30s , +17d 04m 12.2s) | C | 60 | 18.3 | 1867 | 2025-02-07 02:37:32 | MASTER-SAAO | (08h 41m 00.29s , +17d 04m 12.1s) | C | 180 | 18.9 | Coadd 1886 | 2025-02-07 02:38:51 | MASTER-SAAO | (08h 41m 00.06s , +17d 04m 15.9s) | C | 60 | 18.3 | 1965 | 2025-02-07 02:40:10 | MASTER-SAAO | (08h 40m 59.84s , +17d 04m 19.2s) | C | 60 | 18.3 | 2044 | 2025-02-07 02:41:29 | MASTER-SAAO | (08h 40m 59.57s , +17d 04m 23.3s) | C | 60 | 18.2 | 2104 | 2025-02-07 02:41:29 | MASTER-SAAO | (08h 40m 59.56s , +17d 04m 23.4s) | C | 180 | 18.8 | Coadd 2123 | 2025-02-07 02:42:48 | MASTER-SAAO | (08h 40m 59.30s , +17d 04m 27.4s) | C | 60 | 18.2 | 2203 | 2025-02-07 02:44:07 | MASTER-SAAO | (08h 40m 59.02s , +17d 04m 31.8s) | C | 60 | 18.1 | 2281 | 2025-02-07 02:45:26 | MASTER-SAAO | (08h 40m 58.78s , +17d 04m 36.4s) | C | 60 | 18.1 | 2341 | 2025-02-07 02:45:26 | MASTER-SAAO | (08h 40m 58.77s , +17d 04m 36.5s) | C | 180 | 18.7 | Coadd 2361 | 2025-02-07 02:46:45 | MASTER-SAAO | (08h 40m 58.40s , +17d 04m 42.0s) | C | 60 | 18.0 | 2440 | 2025-02-07 02:48:05 | MASTER-SAAO | (08h 40m 58.05s , +17d 04m 47.5s) | C | 60 | 17.9 | 2519 | 2025-02-07 02:49:24 | MASTER-SAAO | (08h 40m 57.72s , +17d 04m 52.7s) | C | 60 | 17.9 | 2579 | 2025-02-07 02:49:24 | MASTER-SAAO | (08h 40m 57.72s , +17d 04m 52.7s) | C | 180 | 18.5 | Coadd 2599 | 2025-02-07 02:50:43 | MASTER-SAAO | (08h 40m 57.35s , +17d 04m 58.0s) | C | 60 | 17.8 | 2678 | 2025-02-07 02:52:03 | MASTER-SAAO | (08h 40m 56.91s , +17d 05m 03.9s) | C | 60 | 17.6 | 2757 | 2025-02-07 02:53:22 | MASTER-SAAO | (08h 40m 56.44s , +17d 05m 10.0s) | C | 60 | 17.4 | 2836 | 2025-02-07 02:54:41 | MASTER-SAAO | (08h 40m 56.01s , +17d 05m 15.8s) | C | 60 | 17.4 | 2915 | 2025-02-07 02:56:00 | MASTER-SAAO | (08h 40m 55.44s , +17d 05m 22.6s) | C | 60 | 16.8 | 2994 | 2025-02-07 02:57:19 | MASTER-SAAO | (08h 40m 54.71s , +17d 05m 32.1s) | C | 60 | 16.1 | 3074 | 2025-02-07 02:58:38 | MASTER-SAAO | (08h 40m 54.23s , +17d 05m 38.1s) | C | 60 | 15.4 | 3153 | 2025-02-07 02:59:57 | MASTER-SAAO | (08h 40m 53.73s , +17d 05m 43.7s) | C | 60 | 15.3 | 3231 | 2025-02-07 03:01:16 | MASTER-SAAO | (08h 40m 53.86s , +17d 05m 46.9s) | C | 60 | 12.1 | 42320 | 2025-02-07 13:53:05 | MASTER-Tunka | (08h 50m 13.23s , +20d 46m 32.3s) | C | 20 | 18.5 | 42340 | 2025-02-07 13:53:05 | MASTER-Tunka | (08h 50m 13.24s , +20d 46m 32.3s) | C | 60 | 19.2 | Coadd 42344 | 2025-02-07 13:53:28 | MASTER-Tunka | (08h 50m 13.23s , +20d 46m 33.0s) | C | 20 | 18.6 | 42367 | 2025-02-07 13:53:52 | MASTER-Tunka | (08h 50m 13.23s , +20d 46m 34.1s) | C | 20 | 18.5 | 42394 | 2025-02-07 13:54:16 | MASTER-Tunka | (08h 50m 13.22s , +20d 46m 35.3s) | C | 25 | 18.5 | 42423 | 2025-02-07 13:54:44 | MASTER-Tunka | (08h 50m 13.22s , +20d 46m 36.3s) | C | 25 | 18.5 | Filter C is a clear (unfiltred) band.

The observation and reduction will continue. The message may be cited.

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