TITLE: GCN CIRCULAR NUMBER: 35719 SUBJECT: Fermi GRB 240213A: Global MASTER-Net observations report DATE: 24/02/13 20:46:19 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs 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) started inspect of the Fermi GRB 240213A ( Fermi GBM team, GCN 35718) errorbox 547 sec after notice time and 581 sec after trigger time at 2024-02-13 20:20:50 UT, with upper limit up to 15.4 mag. The observations began at zenith distance = 83 deg. The sun altitude is -23.7 deg. MASTER-SAAO robotic telescope located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 240213A errorbox 564 sec after notice time and 598 sec after trigger time at 2024-02-13 20:21:08 UT, with upper limit up to 19.5 mag. The observations began at zenith distance = 53 deg. The sun altitude is -31.8 deg. MASTER-Tunka robotic telescope located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 240213A errorbox 841 sec after notice time and 875 sec after trigger time at 2024-02-13 20:25:45 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 75 deg. The sun altitude is -37.2 deg. The galactic latitude b = 36 deg., longitude l = 273 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2377781 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 641 | 2024-02-13 20:20:50 | MASTER-Amur | (11h 07m 11.98s , -20d 31m 49.5s) | C | 120 | 15.4 | 628 | 2024-02-13 20:21:08 | MASTER-SAAO | (11h 06m 57.05s , -20d 30m 53.7s) | C | 60 | 19.5 | 628 | 2024-02-13 20:21:08 | MASTER-SAAO | (11h 01m 26.58s , -20d 19m 25.9s) | C | 60 | 19.4 | 708 | 2024-02-13 20:22:27 | MASTER-SAAO | (11h 06m 56.96s , -20d 30m 52.9s) | C | 60 | 19.5 | 708 | 2024-02-13 20:22:27 | MASTER-SAAO | (11h 01m 26.50s , -20d 19m 25.2s) | C | 60 | 19.4 | 791 | 2024-02-13 20:23:10 | MASTER-Amur | (11h 07m 14.59s , -20d 30m 39.0s) | C | 140 | 15.4 | 788 | 2024-02-13 20:23:47 | MASTER-SAAO | (11h 06m 56.88s , -20d 30m 52.3s) | C | 60 | 19.3 | 788 | 2024-02-13 20:23:47 | MASTER-SAAO | (11h 01m 26.41s , -20d 19m 24.9s) | C | 60 | 19.4 | 906 | 2024-02-13 20:25:45 | MASTER-Tunka | (11h 05m 09.88s , -20d 06m 52.1s) | C | 60 | 18.4 | 966 | 2024-02-13 20:25:45 | MASTER-Tunka | (11h 05m 09.88s , -20d 06m 52.1s) | C | 180 | 18.8 | Coadd 965 | 2024-02-13 20:25:50 | MASTER-Amur | (11h 07m 07.90s , -20d 31m 27.1s) | C | 170 | 15.1 | 969 | 2024-02-13 20:26:48 | MASTER-Tunka | (11h 05m 10.00s , -20d 06m 51.6s) | C | 60 | 18.4 | 1032 | 2024-02-13 20:27:51 | MASTER-Tunka | (11h 05m 10.11s , -20d 06m 51.4s) | C | 60 | 18.3 | 1095 | 2024-02-13 20:28:55 | MASTER-Tunka | (11h 05m 10.20s , -20d 06m 50.6s) | C | 60 | 18.2 | 1155 | 2024-02-13 20:28:55 | MASTER-Tunka | (11h 05m 10.19s , -20d 06m 50.7s) | C | 180 | 18.8 | Coadd 1160 | 2024-02-13 20:29:00 | MASTER-Amur | (11h 07m 07.37s , -20d 30m 33.7s) | C | 180 | 14.3 | 1159 | 2024-02-13 20:29:58 | MASTER-Tunka | (11h 05m 10.31s , -20d 06m 50.4s) | C | 60 | 18.3 | 1222 | 2024-02-13 20:31:01 | MASTER-Tunka | (11h 05m 10.38s , -20d 06m 49.8s) | C | 60 | 18.3 | 1360 | 2024-02-13 20:32:19 | MASTER-Amur | (11h 07m 11.73s , -20d 31m 38.6s) | C | 180 | 14.0 | 1349 | 2024-02-13 20:33:08 | MASTER-Tunka | (11h 05m 10.60s , -20d 06m 48.8s) | C | 60 | 18.3 | 1409 | 2024-02-13 20:33:08 | MASTER-Tunka | (11h 05m 10.59s , -20d 06m 48.6s) | C | 180 | 18.7 | Coadd 1412 | 2024-02-13 20:34:11 | MASTER-Tunka | (11h 05m 10.65s , -20d 06m 48.8s) | C | 60 | 18.3 | 1559 | 2024-02-13 20:35:38 | MASTER-Amur | (11h 07m 06.10s , -20d 32m 41.8s) | C | 180 | 13.6 | 1544 | 2024-02-13 20:36:23 | MASTER-Tunka | (11h 05m 11.14s , -20d 05m 45.1s) | C | 60 | 18.1 | 1670 | 2024-02-13 20:38:29 | MASTER-Tunka | (11h 05m 11.38s , -20d 05m 44.6s) | C | 60 | 18.5 | 1733 | 2024-02-13 20:39:33 | MASTER-Tunka | (11h 05m 11.46s , -20d 05m 44.6s) | C | 60 | 18.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.