TITLE: GCN CIRCULAR NUMBER: 31542 SUBJECT: IceCube Alert 220202.49: Global MASTER-Net observations report DATE: 22/02/02 12:26:08 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, T.Pogrosheva, E.Minkina, A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov, D. Cheryasov (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), B.L.Carrasco, J.R.Valdes,V.Chavushyan, C.J.Martinez, V.M.Patino Alvarez, M.L.H.Rodriguez (INAOE, OAGH) A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (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 220202.49 (trigger No 22093816,01h 30m 27.12s , -03d 43m 19.2s, R=0.51) errorbox 114 sec after notice time and 168 sec after trigger time at 2022-02-02 11:51:26 UT, with upper limit up to 13.9 mag. The observations began at zenith distance = 72 deg. The sun altitude is -33.1 deg. The galactic latitude b = -64 deg., longitude l = 147 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1867985 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 183 | 2022-02-02 11:51:26 | MASTER-Amur | (01h 31m 11.30s , -04d 03m 49.9s) | P\ | 30 | 13.1 | 238 | 2022-02-02 11:52:16 | MASTER-Amur | (01h 31m 05.66s , -04d 04m 54.3s) | P\ | 40 | 13.1 | 382 | 2022-02-02 11:54:25 | MASTER-Amur | (01h 31m 09.68s , -04d 03m 28.5s) | P\ | 70 | 12.4 | 481 | 2022-02-02 11:55:54 | MASTER-Amur | (01h 31m 09.70s , -04d 05m 10.1s) | P\ | 90 | 13.3 | 601 | 2022-02-02 11:57:44 | MASTER-Amur | (01h 31m 12.52s , -04d 03m 10.6s) | P\ | 110 | 13.3 | 741 | 2022-02-02 11:59:54 | MASTER-Amur | (01h 31m 05.75s , -04d 04m 07.8s) | P\ | 130 | 13.8 | 905 | 2022-02-02 12:02:23 | MASTER-Amur | (01h 31m 07.17s , -04d 03m 07.5s) | P\ | 160 | 13.9 | 1094 | 2022-02-02 12:05:22 | MASTER-Amur | (01h 31m 13.34s , -04d 04m 08.0s) | P\ | 180 | 13.9 | 1294 | 2022-02-02 12:08:42 | MASTER-Amur | (01h 31m 06.52s , -04d 05m 05.1s) | P\ | 180 | 13.9 | 1494 | 2022-02-02 12:12:02 | MASTER-Amur | (01h 31m 13.73s , -04d 04m 41.5s) | P\ | 180 | 13.8 | 1693 | 2022-02-02 12:15:21 | MASTER-Amur | (01h 31m 10.91s , -04d 03m 10.5s) | P\ | 180 | 13.9 | The observation and reduction will continue. The message may be cited.