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GCN Circular 36848

Fermi trigger No 742405878: Global MASTER-Net observations report
2024-07-11T18:00:30Z (8 days ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
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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-Amur robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB240711.66 (trigger No 742405878,15h 47m 28.08s , +35d 49m 01.2s, R=36.13) errorbox  4306 sec after notice time and 4322 sec after trigger time at 2024-07-11 17:03:16 UT, with upper limit up to  13.8 mag. Observations started at twilight.  The observations began at zenith distance = 60 deg. The sun  altitude  is -15.4 deg. 

The galactic latitude b = 51 deg., longitude l = 57 deg.

Real time updated cover map and OT discovered available here:

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment

    4328 | 2024-07-11 17:03:16 |         MASTER-Amur | (16h 00m 35.06s , +25d 50m 14.1s) |   C |    10 | 13.6 |        
    4328 | 2024-07-11 17:03:16 |         MASTER-Amur | (16h 00m 45.56s , +25d 25m 17.8s) |   C |    10 | 13.0 |        
    4371 | 2024-07-11 17:03:59 |         MASTER-Amur | (16h 00m 40.90s , +25d 50m 21.1s) |   C |    10 | 13.8 |        
    4371 | 2024-07-11 17:03:59 |         MASTER-Amur | (16h 00m 51.43s , +25d 25m 23.8s) |   C |    10 | 13.1 |        
Filter C is a clear (unfiltred) band. 

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

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