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GCN Circular 35901

Fermi trigger No 731571927: Global MASTER-Net observations report
2024-03-08T10:31:11Z (4 months 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 GRB240308.27 (trigger No 731571927,05h 49m 38.40s , +64d 00m 36.0s, R=4.1) errorbox  13970 sec after notice time and 14002 sec after trigger time at 2024-03-08 10:18:44 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 14 deg. The sun  altitude  is -9.6 deg. 

The galactic latitude b = 18 deg., longitude l = 149 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

   14033 | 2024-03-08 10:18:44 |         MASTER-Amur | (05h 39m 16.83s , +63d 53m 18.6s) |   C |    60 | 16.9 |        
   14114 | 2024-03-08 10:20:05 |         MASTER-Amur | (05h 49m 44.24s , +63d 35m 53.1s) |   C |    60 | 16.9 |        
   14196 | 2024-03-08 10:21:28 |         MASTER-Amur | (05h 50m 11.99s , +62d 00m 49.7s) |   C |    60 | 17.0 |        
   14278 | 2024-03-08 10:22:50 |         MASTER-Amur | (06h 00m 20.69s , +61d 42m 50.8s) |   C |    60 | 17.1 |        
Filter C is a clear (unfiltred) band. 

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

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