Fermi GRB 240905B: Global MASTER-Net observations report

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 240905B ( Fermi GBM team, GCN 37389) errorbox 23620 sec after notice time and 23653 sec after trigger time at 2024-09-05 11:01:29 UT, with upper limit up to 16.2 mag. Observations started at twilight. The observations began at zenith distance = 35 deg. The sun altitude is -9.3 deg. The galactic latitude b = 22 deg., longitude l = 41 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2589953 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 23684 | 2024-09-05 11:01:29 | MASTER-Amur | (17h 37m 46.69s , +16d 24m 43.3s) | C | 60 | 16.2 | 23763 | 2024-09-05 11:02:49 | MASTER-Amur | (17h 46m 01.25s , +16d 24m 00.3s) | C | 60 | 16.1 | 23865 | 2024-09-05 11:04:31 | MASTER-Amur | (17h 48m 50.82s , +18d 19m 37.2s) | C | 60 | 15.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.