TITLE: GCN CIRCULAR NUMBER: 38723 SUBJECT: Fermi trigger No 757231333: Global MASTER-Net observations report DATE: 24/12/30 09:45:52 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB241230.25 (trigger No 757231333,16h 38m 24.00s , -63d 12m 00.0s, R=29.63) errorbox 975 sec after notice time and 984 sec after trigger time at 2024-12-30 06:18:33 UT, with upper limit up to 18.6 mag. The observations began at zenith distance = 45 deg. The sun altitude is -30.6 deg. The galactic latitude b = -11 deg., longitude l = 326 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2726669 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 1015 | 2024-12-30 06:18:33 | MASTER-OAFA | (11h 29m 50.20s , -65d 17m 29.7s) | C | 60 | 18.4 | 1093 | 2024-12-30 06:19:51 | MASTER-OAFA | (11h 29m 47.79s , -65d 15m 59.2s) | C | 60 | 18.5 | 1168 | 2024-12-30 06:21:06 | MASTER-OAFA | (11h 29m 47.74s , -65d 17m 22.1s) | C | 60 | 18.5 | 2540 | 2024-12-30 06:43:58 | MASTER-OAFA | (11h 29m 48.44s , -65d 15m 03.2s) | C | 60 | 18.6 | 2617 | 2024-12-30 06:45:15 | MASTER-OAFA | (11h 29m 48.52s , -65d 16m 32.4s) | C | 60 | 18.6 | 2694 | 2024-12-30 06:46:32 | MASTER-OAFA | (11h 29m 51.22s , -65d 14m 54.9s) | C | 60 | 18.6 | 4887 | 2024-12-30 07:23:05 | MASTER-OAFA | (11h 29m 49.76s , -65d 13m 17.7s) | C | 60 | 18.5 | 5662 | 2024-12-30 07:36:00 | MASTER-OAFA | (11h 29m 52.28s , -65d 14m 43.1s) | C | 60 | 18.5 | 6199 | 2024-12-30 07:45:08 | MASTER-OAFA | (12h 58m 04.26s , -58d 09m 12.0s) | C | 40 | 17.4 | 6210 | 2024-12-30 07:45:08 | MASTER-OAFA | (13h 15m 06.22s , -57d 42m 12.6s) | C | 60 | 18.3 | 6277 | 2024-12-30 07:46:25 | MASTER-OAFA | (12h 57m 58.18s , -58d 10m 08.2s) | C | 40 | 17.4 | 6287 | 2024-12-30 07:46:25 | MASTER-OAFA | (13h 15m 00.51s , -57d 43m 09.3s) | C | 60 | 18.4 | 6698 | 2024-12-30 07:53:26 | MASTER-OAFA | (12h 58m 03.82s , -58d 09m 47.1s) | C | 40 | 17.4 | 6708 | 2024-12-30 07:53:26 | MASTER-OAFA | (13h 15m 06.11s , -57d 42m 43.2s) | C | 60 | 18.6 | 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/38723. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...