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GCN Circular 31040

Fermi trigger No 657742914: Global MASTER-Net observations report
2021-11-04T21:15:19Z (3 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, 
D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, D.Kuvshinov,  D. Cheryasov
(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. Gres, N.M. Budnev
(Irkutsk State University, API),

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

A. Gabovich, V.Yurkov 
(Blagoveschensk Educational State University)

MASTER-SAAO robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB211104.77 (trigger No 657742914,16h 30m 43.20s , -52d 20m 24.0s, R=3.91) errorbox  22 sec after notice time and 9463 sec after trigger time at 2021-11-04 20:59:32 UT, with upper limit up to  13.9 mag. The observations began at zenith distance = 86 deg. The sun  altitude  is -38.5 deg. 

The galactic latitude b = -3 deg., longitude l = 333 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

    9553 | 2021-11-04 20:59:32 |         MASTER-SAAO | (16h 30m 10.57s , -52d 09m 05.0s) |   C |   180 | 13.9 |        
    9753 | 2021-11-04 21:02:51 |         MASTER-SAAO | (16h 30m 11.25s , -52d 10m 30.4s) |   C |   180 | 13.6 |        
Filter C is a clear (unfiltred) band. 

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