TITLE: GCN CIRCULAR NUMBER: 35992 SUBJECT: Fermi GRB 240328B: Global MASTER-Net observations report DATE: 24/03/29 17:31:00 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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 240328B ( Fermi GBM team, GCN 35987) errorbox 77794 sec after notice time and 77830 sec after trigger time at 2024-03-29 16:46:21 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 77 deg. The sun altitude is -35.1 deg. The galactic latitude b = 34 deg., longitude l = 339 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2409475 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 77860 | 2024-03-29 16:46:21 | MASTER-Tunka | (14h 36m 48.87s , -18d 22m 09.4s) | C | 60 | 15.5 | 77861 | 2024-03-29 16:46:21 | MASTER-Tunka | (14h 38m 08.41s , -17d 38m 54.4s) | C | 60 | 17.1 | 77948 | 2024-03-29 16:47:48 | MASTER-Tunka | (14h 43m 59.49s , -16d 29m 36.2s) | C | 60 | 16.7 | 77949 | 2024-03-29 16:47:49 | MASTER-Tunka | (14h 45m 17.79s , -15d 46m 24.1s) | C | 60 | 17.5 | 78035 | 2024-03-29 16:49:15 | MASTER-Tunka | (14h 59m 41.92s , -16d 31m 40.9s) | C | 60 | 15.7 | 78036 | 2024-03-29 16:49:16 | MASTER-Tunka | (15h 01m 00.09s , -15d 48m 28.9s) | C | 60 | 16.2 | 78123 | 2024-03-29 16:50:43 | MASTER-Tunka | (14h 51m 54.70s , -14d 36m 43.5s) | C | 60 | 14.7 | 78157 | 2024-03-29 16:51:17 | MASTER-Tunka | (14h 53m 11.85s , -13d 53m 33.8s) | C | 60 | 15.4 | Coadd 78237 | 2024-03-29 16:52:37 | MASTER-Tunka | (15h 10m 06.13s , -17d 41m 11.5s) | C | 60 | 14.3 | Coadd 78286 | 2024-03-29 16:53:27 | MASTER-Tunka | (14h 25m 09.56s , -22d 10m 42.9s) | C | 60 | 15.8 | 78321 | 2024-03-29 16:54:01 | MASTER-Tunka | (14h 26m 31.98s , -21d 27m 18.2s) | C | 60 | 16.0 | Coadd 78369 | 2024-03-29 16:54:50 | MASTER-Tunka | (15h 07m 35.00s , -14d 36m 19.1s) | C | 60 | 15.5 | 78404 | 2024-03-29 16:55:24 | MASTER-Tunka | (15h 08m 52.07s , -13d 53m 10.3s) | C | 60 | 15.8 | Coadd 78450 | 2024-03-29 16:56:10 | MASTER-Tunka | (14h 28m 06.63s , -16d 28m 01.7s) | C | 60 | 16.8 | 78484 | 2024-03-29 16:56:45 | MASTER-Tunka | (14h 29m 25.11s , -15d 44m 48.3s) | C | 60 | 16.8 | Coadd 80063 | 2024-03-29 17:23:03 | MASTER-Tunka | (14h 36m 52.24s , -18d 20m 38.6s) | C | 60 | 15.7 | 80150 | 2024-03-29 17:24:30 | MASTER-Tunka | (14h 43m 57.08s , -16d 28m 17.8s) | C | 60 | 13.5 | 80198 | 2024-03-29 17:25:18 | MASTER-Tunka | (14h 45m 14.95s , -15d 45m 08.6s) | C | 60 | 14.5 | Coadd 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/35992. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...