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GCN Circular 37879

Subject
Fermi trigger No 751554401: Global MASTER-Net observations report
Date
2024-10-25T15:45:52Z (2 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
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 GRB241025.55 (trigger No 751554401,16h 59m 28.80s , +08d 05m 24.0s, R=7.42) errorbox  83 sec after notice time and 125 sec after trigger time at 2024-10-25 13:08:42 UT, with upper limit up to  16.6 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -30.9 deg. 

The galactic latitude b = 28 deg., longitude l = 28 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2649020

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

     141 | 2024-10-25 13:08:42 |        MASTER-Tunka | (16h 50m 42.80s , +08d 56m 22.2s) |   C |    30 | 16.5 |        
     175 | 2024-10-25 13:09:15 |        MASTER-Tunka | (16h 50m 42.73s , +08d 56m 20.9s) |   C |    30 | 16.4 |        
     213 | 2024-10-25 13:09:49 |        MASTER-Tunka | (16h 50m 42.70s , +08d 56m 20.0s) |   C |    40 | 16.5 |        
     262 | 2024-10-25 13:10:32 |        MASTER-Tunka | (16h 50m 42.67s , +08d 56m 19.1s) |   C |    50 | 16.6 |        
     320 | 2024-10-25 13:11:26 |        MASTER-Tunka | (16h 50m 42.62s , +08d 56m 18.0s) |   C |    60 | 16.6 |        
     389 | 2024-10-25 13:12:29 |        MASTER-Tunka | (16h 50m 42.61s , +08d 56m 17.5s) |   C |    70 | 16.4 |        
     468 | 2024-10-25 13:13:54 |        MASTER-Tunka | (16h 58m 12.38s , +05d 11m 12.3s) |   C |    60 | 15.3 |        
     541 | 2024-10-25 13:15:06 |        MASTER-Tunka | (17h 06m 11.87s , +05d 12m 08.3s) |   C |    60 | 15.8 |        
     615 | 2024-10-25 13:16:20 |        MASTER-Tunka | (17h 06m 15.49s , +05d 11m 59.6s) |   C |    60 | 13.3 |        
     690 | 2024-10-25 13:17:35 |        MASTER-Tunka | (16h 51m 02.93s , +08d 59m 45.4s) |   C |    60 | 13.9 |        
     768 | 2024-10-25 13:18:54 |        MASTER-Tunka | (16h 59m 04.30s , +08d 58m 35.2s) |   C |    60 | 13.4 |        
     841 | 2024-10-25 13:20:07 |        MASTER-Tunka | (16h 51m 04.39s , +08d 58m 49.8s) |   C |    60 | 13.2 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.