GCN Circular 40659
Subject
Fermi trigger No 771072240: Global MASTER-Net observations report
Date
2025-06-09T22:15:22Z (6 days ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko,
G.Antipov, A.Sankovich, Yu.Tselik, 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.Sosnovskij (CrAO),
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 GRB250608.45 (trigger No 771072240,18h 58m 24.00s , -32d 43m 01.2s, R=6.1) errorbox 64054 sec after notice time and 64085 sec after trigger time at 2025-06-09 04:32:01 UT, with upper limit up to 19.5 mag. The observations began at zenith distance = 30 deg. The sun altitude is -81.9 deg.
MASTER-Kislovodsk robotic telescope located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB250608.45 errorbox 1 days 36182 sec after notice time and 1 days 36214 sec after trigger time at 2025-06-09 20:47:29 UT, with upper limit up to 15.5 mag. The observations began at zenith distance = 77 deg. The sun altitude is -23.8 deg.
The galactic latitude b = -16 deg., longitude l = 4 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2896146
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
64116 | 2025-06-09 04:32:01 | MASTER-OAFA | (19h 30m 55.33s , -36d 57m 14.1s) | C | 60 | 19.1 |
65166 | 2025-06-09 04:49:31 | MASTER-OAFA | (19h 30m 59.76s , -36d 56m 31.4s) | C | 60 | 19.5 |
65650 | 2025-06-09 04:57:34 | MASTER-OAFA | (19h 30m 58.75s , -36d 55m 39.0s) | C | 60 | 19.4 |
68036 | 2025-06-09 05:37:21 | MASTER-OAFA | (19h 31m 07.13s , -36d 41m 35.0s) | C | 60 | 19.4 |
68522 | 2025-06-09 05:45:27 | MASTER-OAFA | (19h 31m 06.30s , -36d 41m 13.9s) | C | 60 | 19.5 |
69009 | 2025-06-09 05:53:34 | MASTER-OAFA | (19h 31m 03.36s , -36d 42m 55.3s) | C | 60 | 19.5 |
69497 | 2025-06-09 06:01:42 | MASTER-OAFA | (19h 31m 04.35s , -36d 40m 37.0s) | C | 60 | 19.4 |
69826 | 2025-06-09 06:07:11 | MASTER-OAFA | (19h 31m 08.26s , -36d 40m 52.2s) | C | 60 | 19.4 |
70159 | 2025-06-09 06:12:44 | MASTER-OAFA | (19h 31m 06.33s , -36d 40m 14.9s) | C | 60 | 19.4 |
70469 | 2025-06-09 06:17:54 | MASTER-OAFA | (19h 31m 09.41s , -36d 41m 37.9s) | C | 60 | 19.4 |
70775 | 2025-06-09 06:23:00 | MASTER-OAFA | (19h 31m 12.45s , -36d 40m 50.8s) | C | 60 | 19.4 |
71084 | 2025-06-09 06:28:09 | MASTER-OAFA | (19h 31m 10.44s , -36d 41m 34.6s) | C | 60 | 19.5 |
71399 | 2025-06-09 06:33:24 | MASTER-OAFA | (19h 31m 14.25s , -36d 40m 30.1s) | C | 60 | 19.5 |
71707 | 2025-06-09 06:38:32 | MASTER-OAFA | (19h 31m 11.50s , -36d 41m 01.5s) | C | 60 | 19.5 |
72014 | 2025-06-09 06:43:39 | MASTER-OAFA | (19h 31m 15.65s , -36d 40m 10.5s) | C | 60 | 19.5 |
72321 | 2025-06-09 06:48:46 | MASTER-OAFA | (19h 31m 12.58s , -36d 40m 38.8s) | C | 60 | 19.5 |
72630 | 2025-06-09 06:53:55 | MASTER-OAFA | (19h 31m 17.14s , -36d 39m 51.6s) | C | 60 | 19.4 |
72936 | 2025-06-09 06:59:01 | MASTER-OAFA | (19h 31m 13.69s , -36d 40m 24.0s) | C | 60 | 19.5 |
73250 | 2025-06-09 07:04:15 | MASTER-OAFA | (19h 31m 17.14s , -36d 39m 33.8s) | C | 60 | 19.5 |
73560 | 2025-06-09 07:09:25 | MASTER-OAFA | (19h 31m 14.84s , -36d 40m 20.0s) | C | 60 | 19.5 |
73869 | 2025-06-09 07:14:33 | MASTER-OAFA | (19h 31m 19.03s , -36d 39m 17.2s) | C | 60 | 19.5 |
74177 | 2025-06-09 07:19:42 | MASTER-OAFA | (19h 31m 15.99s , -36d 39m 54.3s) | C | 60 | 19.5 |
74484 | 2025-06-09 07:24:49 | MASTER-OAFA | (19h 31m 20.12s , -36d 39m 02.1s) | C | 60 | 19.5 |
74789 | 2025-06-09 07:29:54 | MASTER-OAFA | (19h 31m 17.04s , -36d 39m 50.7s) | C | 60 | 19.5 |
75093 | 2025-06-09 07:34:58 | MASTER-OAFA | (19h 31m 20.15s , -36d 38m 47.4s) | C | 60 | 19.5 |
75403 | 2025-06-09 07:40:08 | MASTER-OAFA | (19h 31m 18.15s , -36d 39m 38.7s) | C | 60 | 19.5 |
75715 | 2025-06-09 07:45:19 | MASTER-OAFA | (19h 31m 21.22s , -36d 38m 34.1s) | C | 60 | 19.5 |
76022 | 2025-06-09 07:50:27 | MASTER-OAFA | (19h 31m 19.23s , -36d 39m 26.2s) | C | 60 | 19.5 |
122644 | 2025-06-09 20:47:29 | MASTER-Kislovodsk | (18h 44m 38.33s , -28d 52m 41.1s) | C | 60 | 14.9 |
123915 | 2025-06-09 21:08:40 | MASTER-Kislovodsk | (18h 53m 54.00s , -28d 54m 08.0s) | C | 60 | 15.5 |
124398 | 2025-06-09 21:16:43 | MASTER-Kislovodsk | (18h 44m 48.56s , -28d 52m 59.8s) | C | 60 | 15.3 |
125574 | 2025-06-09 21:36:19 | MASTER-Kislovodsk | (18h 54m 02.56s , -28d 52m 50.1s) | C | 60 | 15.5 |
125657 | 2025-06-09 21:37:42 | MASTER-Kislovodsk | (18h 44m 48.28s , -28d 53m 42.7s) | C | 60 | 15.1 |
125992 | 2025-06-09 21:43:17 | MASTER-Kislovodsk | (18h 48m 58.76s , -30d 47m 39.7s) | C | 60 | 15.2 |
126075 | 2025-06-09 21:44:40 | MASTER-Kislovodsk | (18h 58m 21.50s , -30d 46m 20.3s) | C | 60 | 15.3 |
127298 | 2025-06-09 22:05:03 | MASTER-Kislovodsk | (18h 44m 56.79s , -28d 53m 04.2s) | C | 60 | 15.2 |
127533 | 2025-06-09 22:08:58 | MASTER-Kislovodsk | (18h 54m 33.00s , -32d 42m 02.5s) | C | 60 | 15.4 |
127616 | 2025-06-09 22:10:20 | MASTER-Kislovodsk | (18h 49m 06.63s , -30d 47m 59.8s) | C | 60 | 15.4 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.