GCN Circular 40140
Subject
Fermi trigger No 766148493: Global MASTER-Net observations report
Date
2025-04-13T12:17:28Z (11 days ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
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 GRB250412.46 (trigger No 766148493,18h 37m 40.08s , -21d 24m 00.0s, R=27.37) errorbox 71363 sec after notice time and 71412 sec after trigger time at 2025-04-13 06:51:41 UT, with upper limit up to 19.0 mag. The observations began at zenith distance = 22 deg. The sun altitude is -51.4 deg.
The galactic latitude b = -7 deg., longitude l = 13 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2840647
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
71442 | 2025-04-13 06:51:41 | MASTER-OAFA | (16h 41m 59.81s , -14d 00m 54.0s) | C | 60 | 18.9 |
72078 | 2025-04-13 07:02:17 | MASTER-OAFA | (16h 42m 00.36s , -14d 00m 60.0s) | C | 60 | 18.9 |
72712 | 2025-04-13 07:12:51 | MASTER-OAFA | (16h 41m 58.68s , -14d 01m 07.6s) | C | 60 | 18.9 |
73344 | 2025-04-13 07:23:22 | MASTER-OAFA | (16h 41m 58.45s , -14d 01m 17.4s) | C | 60 | 19.0 |
73975 | 2025-04-13 07:33:53 | MASTER-OAFA | (16h 41m 56.43s , -14d 01m 29.7s) | C | 60 | 18.9 |
74436 | 2025-04-13 07:41:44 | MASTER-OAFA | (16h 35m 30.51s , -18d 13m 33.1s) | C | 40 | 17.4 |
74446 | 2025-04-13 07:41:45 | MASTER-OAFA | (16h 45m 08.33s , -17d 49m 39.7s) | C | 60 | 18.9 |
74611 | 2025-04-13 07:44:29 | MASTER-OAFA | (16h 41m 55.83s , -14d 01m 43.6s) | C | 60 | 18.8 |
75080 | 2025-04-13 07:52:28 | MASTER-OAFA | (16h 35m 29.88s , -18d 13m 38.3s) | C | 40 | 17.4 |
75090 | 2025-04-13 07:52:29 | MASTER-OAFA | (16h 45m 07.85s , -17d 49m 44.2s) | C | 60 | 18.8 |
75721 | 2025-04-13 08:03:09 | MASTER-OAFA | (16h 35m 29.19s , -18d 13m 50.2s) | C | 40 | 17.4 |
75731 | 2025-04-13 08:03:09 | MASTER-OAFA | (16h 45m 07.28s , -17d 49m 54.5s) | C | 60 | 18.9 |
76113 | 2025-04-13 08:09:42 | MASTER-OAFA | (16h 40m 23.31s , -12d 33m 39.8s) | C | 40 | 17.3 |
76124 | 2025-04-13 08:09:42 | MASTER-OAFA | (16h 49m 45.59s , -12d 09m 55.2s) | C | 60 | 19.0 |
76352 | 2025-04-13 08:13:41 | MASTER-OAFA | (16h 35m 28.58s , -18d 14m 22.3s) | C | 40 | 17.5 |
76363 | 2025-04-13 08:13:41 | MASTER-OAFA | (16h 45m 06.73s , -17d 50m 26.1s) | C | 60 | 18.9 |
76741 | 2025-04-13 08:20:09 | MASTER-OAFA | (16h 40m 23.12s , -12d 34m 01.7s) | C | 40 | 17.4 |
76751 | 2025-04-13 08:20:09 | MASTER-OAFA | (16h 49m 45.46s , -12d 10m 17.1s) | C | 60 | 19.0 |
76977 | 2025-04-13 08:24:05 | MASTER-OAFA | (16h 35m 28.03s , -18d 14m 44.0s) | C | 40 | 17.4 |
76987 | 2025-04-13 08:24:06 | MASTER-OAFA | (16h 45m 06.25s , -17d 50m 47.6s) | C | 60 | 18.9 |
77365 | 2025-04-13 08:30:34 | MASTER-OAFA | (16h 40m 21.49s , -12d 34m 25.5s) | C | 40 | 17.4 |
77376 | 2025-04-13 08:30:34 | MASTER-OAFA | (16h 49m 43.82s , -12d 10m 40.7s) | C | 60 | 19.0 |
77605 | 2025-04-13 08:34:33 | MASTER-OAFA | (16h 35m 27.53s , -18d 14m 38.7s) | C | 40 | 17.5 |
77615 | 2025-04-13 08:34:33 | MASTER-OAFA | (16h 45m 05.72s , -17d 50m 42.0s) | C | 60 | 18.9 |
78005 | 2025-04-13 08:41:13 | MASTER-OAFA | (16h 40m 20.17s , -12d 34m 52.6s) | C | 40 | 17.3 |
78015 | 2025-04-13 08:41:14 | MASTER-OAFA | (16h 49m 42.55s , -12d 11m 07.5s) | C | 60 | 19.0 |
78081 | 2025-04-13 08:42:30 | MASTER-OAFA | (16h 41m 20.13s , -16d 21m 21.6s) | C | 40 | 17.3 |
78092 | 2025-04-13 08:42:30 | MASTER-OAFA | (16h 50m 52.28s , -15d 57m 29.2s) | C | 60 | 18.8 |
78170 | 2025-04-13 08:43:49 | MASTER-OAFA | (16h 40m 20.39s , -19d 42m 46.1s) | C | 60 | 18.8 |
78633 | 2025-04-13 08:51:41 | MASTER-OAFA | (16h 40m 18.89s , -12d 35m 21.0s) | C | 40 | 17.3 |
78643 | 2025-04-13 08:51:42 | MASTER-OAFA | (16h 49m 41.25s , -12d 11m 35.4s) | C | 60 | 19.0 |
78713 | 2025-04-13 08:53:01 | MASTER-OAFA | (16h 41m 21.18s , -16d 21m 52.5s) | C | 40 | 17.3 |
78723 | 2025-04-13 08:53:01 | MASTER-OAFA | (16h 50m 53.34s , -15d 57m 59.8s) | C | 60 | 18.8 |
78801 | 2025-04-13 08:54:19 | MASTER-OAFA | (16h 40m 20.18s , -19d 43m 30.6s) | C | 60 | 18.8 |
79314 | 2025-04-13 09:03:02 | MASTER-OAFA | (16h 40m 18.08s , -12d 35m 54.6s) | C | 40 | 17.3 |
79324 | 2025-04-13 09:03:02 | MASTER-OAFA | (16h 49m 40.44s , -12d 12m 09.5s) | C | 60 | 19.0 |
79390 | 2025-04-13 09:04:19 | MASTER-OAFA | (16h 41m 18.83s , -16d 22m 11.9s) | C | 40 | 17.3 |
79401 | 2025-04-13 09:04:19 | MASTER-OAFA | (16h 50m 50.92s , -15d 58m 18.8s) | C | 60 | 18.8 |
79479 | 2025-04-13 09:05:37 | MASTER-OAFA | (16h 40m 20.15s , -19d 43m 53.1s) | C | 60 | 18.8 |
79797 | 2025-04-13 09:10:55 | MASTER-OAFA | (16h 36m 33.34s , -21d 36m 50.4s) | C | 60 | 18.8 |
80061 | 2025-04-13 09:15:29 | MASTER-OAFA | (16h 41m 18.16s , -16d 22m 52.3s) | C | 40 | 17.2 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.