TITLE: GCN CIRCULAR NUMBER: 35800 SUBJECT: Fermi trigger No 730618809: Global MASTER-Net observations report DATE: 24/02/26 16:15:44 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB240226.24 (trigger No 730618809,02h 52m 02.40s , -31d 12m 36.0s, R=7.65) errorbox 36154 sec after notice time and 36188 sec after trigger time at 2024-02-26 15:43:12 UT, with upper limit up to 17.5 mag. Observations started at twilight. The observations began at zenith distance = 79 deg. The sun altitude is -9.6 deg. The galactic latitude b = -63 deg., longitude l = 229 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2386378 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 36218 | 2024-02-26 15:43:12 | MASTER-Kislovodsk | (02h 58m 26.68s , -31d 01m 44.4s) | C | 60 | 13.9 | 36218 | 2024-02-26 15:43:12 | MASTER-Kislovodsk | (02h 54m 06.89s , -30d 41m 25.8s) | C | 60 | 14.8 | 36298 | 2024-02-26 15:44:32 | MASTER-Kislovodsk | (02h 55m 07.43s , -29d 08m 44.3s) | C | 60 | 14.7 | 36298 | 2024-02-26 15:44:32 | MASTER-Kislovodsk | (02h 50m 52.02s , -28d 48m 23.5s) | C | 60 | 15.1 | 36378 | 2024-02-26 15:45:53 | MASTER-Kislovodsk | (02h 37m 39.69s , -29d 10m 12.7s) | C | 60 | 14.4 | 36378 | 2024-02-26 15:45:53 | MASTER-Kislovodsk | (02h 33m 24.60s , -28d 49m 54.8s) | C | 60 | 14.7 | 36459 | 2024-02-26 15:47:13 | MASTER-Kislovodsk | (02h 52m 01.56s , -27d 15m 24.6s) | C | 60 | 14.7 | 36459 | 2024-02-26 15:47:13 | MASTER-Kislovodsk | (02h 47m 48.96s , -26d 55m 02.6s) | C | 60 | 14.8 | 36539 | 2024-02-26 15:48:33 | MASTER-Kislovodsk | (03h 12m 28.66s , -29d 07m 38.0s) | C | 60 | 14.8 | 36539 | 2024-02-26 15:48:33 | MASTER-Kislovodsk | (03h 08m 11.71s , -28d 47m 15.0s) | C | 60 | 14.4 | 36620 | 2024-02-26 15:49:54 | MASTER-Kislovodsk | (03h 16m 14.04s , -31d 03m 27.6s) | C | 60 | 14.7 | 36620 | 2024-02-26 15:49:54 | MASTER-Kislovodsk | (03h 11m 52.95s , -30d 43m 05.0s) | C | 60 | 14.6 | 36700 | 2024-02-26 15:51:14 | MASTER-Kislovodsk | (02h 34m 58.36s , -27d 14m 41.8s) | C | 60 | 13.8 | 36700 | 2024-02-26 15:51:14 | MASTER-Kislovodsk | (02h 30m 46.46s , -26d 54m 23.0s) | C | 60 | 14.0 | 36780 | 2024-02-26 15:52:34 | MASTER-Kislovodsk | (03h 09m 02.22s , -27d 14m 39.7s) | C | 60 | 14.6 | 36780 | 2024-02-26 15:52:34 | MASTER-Kislovodsk | (03h 04m 49.01s , -26d 54m 16.6s) | C | 60 | 14.4 | 36860 | 2024-02-26 15:53:54 | MASTER-Kislovodsk | (02h 49m 13.08s , -25d 21m 04.1s) | C | 60 | 15.1 | 36860 | 2024-02-26 15:53:54 | MASTER-Kislovodsk | (02h 45m 03.73s , -25d 00m 41.9s) | C | 60 | 15.1 | 36940 | 2024-02-26 15:55:14 | MASTER-Kislovodsk | (03h 05m 55.68s , -25d 21m 45.8s) | C | 60 | 15.5 | 36940 | 2024-02-26 15:55:14 | MASTER-Kislovodsk | (03h 01m 45.70s , -25d 01m 21.9s) | C | 60 | 15.7 | 37020 | 2024-02-26 15:56:35 | MASTER-Kislovodsk | (02h 32m 25.83s , -25d 22m 03.6s) | C | 60 | 16.1 | 37021 | 2024-02-26 15:56:35 | MASTER-Kislovodsk | (02h 28m 17.38s , -25d 01m 44.2s) | C | 60 | 16.3 | 37101 | 2024-02-26 15:57:55 | MASTER-Kislovodsk | (02h 46m 37.54s , -23d 26m 36.0s) | C | 60 | 15.5 | 37101 | 2024-02-26 15:57:55 | MASTER-Kislovodsk | (02h 42m 31.16s , -23d 06m 12.6s) | C | 60 | 15.1 | 37181 | 2024-02-26 15:59:15 | MASTER-Kislovodsk | (03h 26m 09.15s , -27d 15m 27.4s) | C | 60 | 17.1 | 37181 | 2024-02-26 15:59:15 | MASTER-Kislovodsk | (03h 21m 55.52s , -26d 55m 02.1s) | C | 60 | 17.5 | 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/35800. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...