TITLE: GCN CIRCULAR NUMBER: 35837 SUBJECT: IceCube Alert 240229.66: Global MASTER-Net observations report DATE: 24/02/29 16:26:43 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (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. Gress, N.M. Budnev, O.Ershova (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), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the IceCube Alert 240229.66 (trigger No 47725621,04h 49m 48.72s , +15d 59m 45.6s, R=0.51) errorbox 15 sec after notice time and 67 sec after trigger time at 2024-02-29 15:49:29 UT, with upper limit up to 13.5 mag. The observations began at zenith distance = 78 deg. The sun altitude is -47.7 deg. MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the IceCube Alert 240229.66 errorbox 297 sec after notice time and 349 sec after trigger time at 2024-02-29 15:54:10 UT, with upper limit up to 17.5 mag. Observations started at twilight. The observations began at zenith distance = 28 deg. The sun altitude is -10.9 deg. MASTER-Tavrida robotic telescope located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the IceCube Alert 240229.66 errorbox 1277 sec after notice time and 1329 sec after trigger time at 2024-02-29 16:10:31 UT, with upper limit up to 15.2 mag. Observations started at twilight. The observations began at zenith distance = 29 deg. The sun altitude is -8.1 deg. The galactic latitude b = -17 deg., longitude l = 184 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2388732 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 72 | 2024-02-29 15:49:29 | MASTER-Amur | (04h 51m 01.21s , +15d 59m 00.4s) | P\ | 10 | 12.5 | 152 | 2024-02-29 15:50:38 | MASTER-Amur | (04h 51m 03.22s , +15d 59m 08.6s) | P\ | 30 | 13.2 | 208 | 2024-02-29 15:51:29 | MASTER-Amur | (04h 50m 58.13s , +15d 58m 20.0s) | P\ | 40 | 13.3 | 347 | 2024-02-29 15:53:38 | MASTER-Amur | (04h 51m 04.06s , +15d 58m 24.5s) | P\ | 60 | 13.5 | 384 | 2024-02-29 15:54:10 | MASTER-Kislovodsk | (04h 49m 58.40s , +16d 05m 28.4s) | C | 70 | 12.3 | 384 | 2024-02-29 15:54:10 | MASTER-Kislovodsk | (04h 49m 57.26s , +16d 28m 05.5s) | C | 70 | 12.2 | 437 | 2024-02-29 15:54:58 | MASTER-Amur | (04h 50m 58.04s , +15d 57m 27.0s) | P\ | 80 | 13.1 | 484 | 2024-02-29 15:55:40 | MASTER-Kislovodsk | (04h 49m 59.83s , +16d 04m 33.7s) | C | 90 | 12.2 | 547 | 2024-02-29 15:56:38 | MASTER-Amur | (04h 51m 04.06s , +15d 57m 32.5s) | P\ | 100 | 13.4 | 605 | 2024-02-29 15:57:31 | MASTER-Kislovodsk | (04h 50m 07.85s , +16d 05m 23.7s) | C | 110 | 12.6 | 605 | 2024-02-29 15:57:31 | MASTER-Kislovodsk | (04h 49m 56.44s , +16d 28m 50.3s) | C | 110 | 12.6 | 676 | 2024-02-29 15:58:37 | MASTER-Amur | (04h 51m 01.30s , +15d 59m 11.0s) | P\ | 120 | 13.3 | 750 | 2024-02-29 15:59:41 | MASTER-Kislovodsk | (04h 50m 03.02s , +16d 04m 39.0s) | C | 140 | 13.1 | 831 | 2024-02-29 16:00:57 | MASTER-Amur | (04h 51m 01.22s , +15d 57m 55.9s) | P\ | 150 | 13.5 | 925 | 2024-02-29 16:02:21 | MASTER-Kislovodsk | (04h 49m 59.91s , +16d 06m 09.7s) | C | 170 | 17.5 | 925 | 2024-02-29 16:02:21 | MASTER-Kislovodsk | (04h 49m 51.26s , +16d 29m 07.6s) | C | 170 | 13.1 | 1015 | 2024-02-29 16:03:46 | MASTER-Amur | (04h 51m 04.48s , +15d 59m 42.6s) | P\ | 180 | 13.3 | 1121 | 2024-02-29 16:05:32 | MASTER-Kislovodsk | (04h 50m 02.06s , +16d 04m 42.6s) | C | 180 | 13.3 | 1121 | 2024-02-29 16:05:32 | MASTER-Kislovodsk | (04h 49m 57.74s , +16d 28m 41.8s) | C | 180 | 12.3 | 1215 | 2024-02-29 16:07:06 | MASTER-Amur | (04h 50m 58.60s , +15d 58m 59.5s) | P\ | 180 | 12.8 | 1321 | 2024-02-29 16:08:52 | MASTER-Kislovodsk | (04h 50m 02.11s , +16d 03m 32.3s) | C | 180 | 13.1 | 1321 | 2024-02-29 16:08:52 | MASTER-Kislovodsk | (04h 49m 53.59s , +16d 26m 20.2s) | C | 180 | 13.7 | 1414 | 2024-02-29 16:10:25 | MASTER-Amur | (04h 50m 57.80s , +16d 00m 08.0s) | P\ | 180 | 12.7 | 1420 | 2024-02-29 16:10:31 | MASTER-Tavrida | (04h 46m 38.11s , +15d 36m 25.0s) | C | 180 | 15.0 | 1522 | 2024-02-29 16:12:13 | MASTER-Kislovodsk | (04h 50m 09.16s , +16d 03m 51.4s) | C | 180 | 13.3 | 1522 | 2024-02-29 16:12:13 | MASTER-Kislovodsk | (04h 50m 06.11s , +16d 27m 24.2s) | C | 180 | 13.7 | 1609 | 2024-02-29 16:13:40 | MASTER-Tavrida | (04h 46m 31.62s , +15d 35m 50.3s) | C | 180 | 15.2 | 1722 | 2024-02-29 16:15:33 | MASTER-Kislovodsk | (04h 50m 06.14s , +16d 05m 26.3s) | C | 180 | 13.4 | 1722 | 2024-02-29 16:15:33 | MASTER-Kislovodsk | (04h 49m 54.31s , +16d 28m 55.1s) | C | 180 | 13.8 | 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/35837. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...