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GCN Circular 28938

Fermi GRB 201121A: Global MASTER-Net observations report
2020-11-21T04:30:09Z (4 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
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, O.Ershova 
(Irkutsk State University, API),

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

V. Yurkov, A. Gabovich, Yu. Sergienko 
(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 GRB 201121A ( Fermi GBM team, GCN 28935) errorbox  663 sec after notice time and 719 sec after trigger time at 2020-11-21 01:41:48 UT, with upper limit up to  16.9 mag. The observations began at zenith distance = 84 deg. The sun  altitude  is -19.8 deg. 

The galactic latitude b = 32 deg., longitude l = 322 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

     790 | 2020-11-21 01:41:48 |         MASTER-SAAO | (13h 47m 06.60s , -27d 51m 18.4s) |   C |   140 | 16.9 |        
     964 | 2020-11-21 01:44:28 |         MASTER-SAAO | (13h 47m 11.79s , -27d 51m 18.3s) |   C |   170 | 16.9 |        
    1159 | 2020-11-21 01:47:37 |         MASTER-SAAO | (13h 47m 06.55s , -27d 49m 47.6s) |   C |   180 | 16.1 |        
Filter C is a clear (unfiltred) band. 

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