TITLE: GCN CIRCULAR NUMBER: 36951 SUBJECT: Fermi GRB 240726A: Global MASTER-Net observations report DATE: 24/07/27 19:45:22 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-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 240726A ( Fermi GBM team, GCN 36935) errorbox 1 days 37487 sec after notice time and 1 days 37518 sec after trigger time at 2024-07-27 18:33:07 UT, with upper limit up to 17.8 mag. Observations started at twilight. The observations began at zenith distance = 66 deg. The sun altitude is -12.7 deg. The galactic latitude b = 29 deg., longitude l = 149 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2541434 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 123949 | 2024-07-27 18:33:07 | MASTER-Tavrida | (07h 29m 45.02s , +67d 15m 35.0s) | C | 60 | 17.0 | 124021 | 2024-07-27 18:34:20 | MASTER-Tavrida | (07h 32m 21.89s , +65d 55m 08.3s) | C | 60 | 17.2 | 124095 | 2024-07-27 18:35:34 | MASTER-Tavrida | (07h 06m 51.82s , +65d 56m 42.9s) | C | 60 | 17.1 | 124190 | 2024-07-27 18:37:08 | MASTER-Tavrida | (07h 03m 09.14s , +67d 36m 51.4s) | C | 60 | 14.7 | 124284 | 2024-07-27 18:38:43 | MASTER-Tavrida | (07h 27m 03.71s , +68d 33m 26.0s) | C | 60 | 17.5 | 124357 | 2024-07-27 18:39:56 | MASTER-Tavrida | (07h 10m 39.52s , +64d 37m 28.3s) | C | 60 | 17.1 | 124668 | 2024-07-27 18:45:06 | MASTER-Tavrida | (06h 58m 49.49s , +68d 53m 16.9s) | C | 60 | 16.0 | 125157 | 2024-07-27 18:53:16 | MASTER-Tavrida | (07h 29m 49.29s , +67d 15m 40.6s) | C | 60 | 17.7 | 125230 | 2024-07-27 18:54:28 | MASTER-Tavrida | (07h 50m 32.61s , +67d 14m 19.2s) | C | 60 | 17.6 | 125303 | 2024-07-27 18:55:41 | MASTER-Tavrida | (07h 32m 24.67s , +65d 55m 29.8s) | C | 60 | 17.5 | 125376 | 2024-07-27 18:56:55 | MASTER-Tavrida | (07h 52m 09.01s , +65d 55m 40.9s) | C | 60 | 17.6 | 125471 | 2024-07-27 18:58:29 | MASTER-Tavrida | (07h 07m 07.62s , +66d 19m 47.9s) | C | 60 | 15.2 | 125566 | 2024-07-27 19:00:04 | MASTER-Tavrida | (07h 26m 34.24s , +65d 56m 25.9s) | C | 60 | 17.4 | 125666 | 2024-07-27 19:01:44 | MASTER-Tavrida | (07h 03m 09.83s , +67d 37m 37.3s) | C | 60 | 15.4 | 125761 | 2024-07-27 19:03:20 | MASTER-Tavrida | (07h 23m 33.94s , +67d 15m 10.3s) | C | 60 | 17.0 | 125857 | 2024-07-27 19:04:55 | MASTER-Tavrida | (07h 27m 20.53s , +68d 56m 05.3s) | C | 60 | 15.9 | 125951 | 2024-07-27 19:06:29 | MASTER-Tavrida | (07h 49m 11.27s , +68d 33m 08.8s) | C | 60 | 17.8 | 126045 | 2024-07-27 19:08:04 | MASTER-Tavrida | (07h 10m 55.30s , +65d 00m 19.5s) | C | 60 | 13.6 | 126140 | 2024-07-27 19:09:38 | MASTER-Tavrida | (07h 29m 31.59s , +64d 38m 26.1s) | C | 60 | 17.2 | 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/36951. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...