Fermi trigger No 745866488: 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 GRB240820.71 (trigger No 745866488,14h 28m 28.08s , +09d 51m 00.0s, R=32.13) errorbox 1802 sec after notice time and 1838 sec after trigger time at 2024-08-20 17:38:41 UT, with upper limit up to 17.9 mag. Observations started at twilight. The observations began at zenith distance = 51 deg. The sun altitude is -10.7 deg. The galactic latitude b = 61 deg., longitude l = 1 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2569425 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 1868 | 2024-08-20 17:38:41 | MASTER-Tavrida | (13h 14m 26.98s , +38d 41m 43.3s) | C | 60 | 16.7 | 1868 | 2024-08-20 17:38:42 | MASTER-Tavrida | (13h 14m 35.07s , +38d 36m 45.2s) | C | 60 | 17.0 | 1943 | 2024-08-20 17:39:57 | MASTER-Tavrida | (13h 24m 39.89s , +38d 42m 32.4s) | C | 60 | 17.0 | 1943 | 2024-08-20 17:39:57 | MASTER-Tavrida | (13h 24m 48.04s , +38d 37m 36.9s) | C | 60 | 17.1 | 2018 | 2024-08-20 17:41:11 | MASTER-Tavrida | (13h 15m 55.45s , +39d 53m 36.8s) | C | 60 | 17.2 | 2094 | 2024-08-20 17:42:27 | MASTER-Tavrida | (13h 26m 19.05s , +39d 58m 35.6s) | C | 60 | 17.3 | 2094 | 2024-08-20 17:42:27 | MASTER-Tavrida | (13h 26m 27.45s , +39d 53m 40.1s) | C | 60 | 17.4 | 2168 | 2024-08-20 17:43:42 | MASTER-Tavrida | (13h 14m 29.34s , +38d 42m 07.1s) | C | 60 | 17.2 | 2168 | 2024-08-20 17:43:42 | MASTER-Tavrida | (13h 14m 37.72s , +38d 37m 11.9s) | C | 60 | 17.3 | 2244 | 2024-08-20 17:44:57 | MASTER-Tavrida | (13h 24m 44.13s , +38d 40m 34.1s) | C | 60 | 17.4 | 2244 | 2024-08-20 17:44:57 | MASTER-Tavrida | (13h 24m 52.47s , +38d 35m 39.3s) | C | 60 | 17.5 | 2319 | 2024-08-20 17:46:13 | MASTER-Tavrida | (13h 16m 01.00s , +39d 55m 27.5s) | C | 60 | 17.5 | 2394 | 2024-08-20 17:47:28 | MASTER-Tavrida | (13h 26m 14.12s , +39d 59m 15.7s) | C | 60 | 17.5 | 2394 | 2024-08-20 17:47:28 | MASTER-Tavrida | (13h 26m 22.63s , +39d 54m 21.3s) | C | 60 | 17.9 | 2469 | 2024-08-20 17:48:43 | MASTER-Tavrida | (13h 14m 27.60s , +38d 42m 23.1s) | C | 60 | 17.4 | 2469 | 2024-08-20 17:48:43 | MASTER-Tavrida | (13h 14m 36.05s , +38d 37m 27.8s) | C | 60 | 17.5 | 2544 | 2024-08-20 17:49:57 | MASTER-Tavrida | (13h 24m 48.58s , +38d 41m 15.5s) | C | 60 | 17.7 | 2544 | 2024-08-20 17:49:58 | MASTER-Tavrida | (13h 24m 56.95s , +38d 36m 20.4s) | C | 60 | 17.6 | 2695 | 2024-08-20 17:52:29 | MASTER-Tavrida | (13h 15m 59.17s , +39d 54m 57.6s) | C | 60 | 17.7 | 2844 | 2024-08-20 17:54:58 | MASTER-Tavrida | (13h 26m 20.76s , +39d 59m 45.9s) | C | 60 | 17.8 | 2844 | 2024-08-20 17:54:58 | MASTER-Tavrida | (13h 26m 29.21s , +39d 54m 51.2s) | C | 60 | 17.9 | 99564 | 2024-08-21 20:45:57 | MASTER-Tavrida | (15h 15m 49.43s , +19d 07m 42.0s) | C | 180 | 14.7 | 99747 | 2024-08-21 20:49:00 | MASTER-Tavrida | (15h 15m 51.12s , +19d 07m 39.1s) | C | 180 | 14.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.