Fermi GRB 241026A: Global MASTER-Net observations report

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 241026A ( Fermi GBM team, GCN 37894) errorbox 4286 sec after notice time and 4328 sec after trigger time at 2024-10-26 23:54:39 UT, with upper limit up to 18.2 mag. The observations began at zenith distance = 73 deg. The sun altitude is -45.5 deg. The galactic latitude b = 12 deg., longitude l = 87 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2650323 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 4359 | 2024-10-26 23:54:39 | MASTER-Tavrida | (20h 07m 36.82s , +52d 57m 11.3s) | C | 60 | 18.0 | 4433 | 2024-10-26 23:55:54 | MASTER-Tavrida | (20h 20m 49.18s , +52d 54m 37.7s) | C | 60 | 18.2 | 4507 | 2024-10-26 23:57:07 | MASTER-Tavrida | (20h 07m 40.76s , +52d 57m 13.9s) | C | 60 | 18.1 | 4581 | 2024-10-26 23:58:22 | MASTER-Tavrida | (20h 20m 46.46s , +52d 55m 30.2s) | C | 60 | 18.1 | 4655 | 2024-10-26 23:59:36 | MASTER-Tavrida | (20h 07m 35.14s , +52d 57m 18.3s) | C | 60 | 18.0 | 4828 | 2024-10-27 00:02:29 | MASTER-Tavrida | (19h 50m 33.53s , +52d 56m 55.0s) | C | 60 | 17.8 | 4904 | 2024-10-27 00:03:45 | MASTER-Tavrida | (20h 03m 42.29s , +52d 57m 18.0s) | C | 60 | 17.9 | 4978 | 2024-10-27 00:04:59 | MASTER-Tavrida | (19h 50m 30.27s , +52d 56m 43.4s) | C | 60 | 17.8 | 5052 | 2024-10-27 00:06:13 | MASTER-Tavrida | (20h 03m 46.20s , +52d 57m 34.6s) | C | 60 | 17.9 | 5127 | 2024-10-27 00:07:28 | MASTER-Tavrida | (19h 50m 27.44s , +52d 57m 29.3s) | C | 60 | 17.7 | 5298 | 2024-10-27 00:10:19 | MASTER-Tavrida | (20h 06m 14.97s , +51d 37m 50.6s) | C | 60 | 17.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.