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GCN Circular 31183

Subject
Swift GRB 211207A: Global MASTER-Net observations report
Date
2021-12-07T22:18:25Z (2 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
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-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the Swift GRB 211207A ( E. Ambrosi et al., GCN 31182) errorbox  4112 sec after notice time and 4128 sec after trigger time at 2021-12-07 22:01:45 UT, with upper limit up to  15.3 mag. The observations began at zenith distance = 87 deg. The sun  altitude  is -66.2 deg. 

The galactic latitude b = 24 deg., longitude l = 261 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1807266

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

    4219 |   MASTER-Kislovodsk |   C |   180 | 14.6 |        
    4219 |   MASTER-Kislovodsk |   C |   180 | 14.3 |        
    4419 |   MASTER-Kislovodsk |   C |   180 | 14.5 |        
    4419 |   MASTER-Kislovodsk |   C |   180 | 14.2 |        
    4619 |   MASTER-Kislovodsk |   C |   180 | 14.8 |        
    4619 |   MASTER-Kislovodsk |   C |   180 | 14.4 |        
    4819 |   MASTER-Kislovodsk |   C |   180 | 15.3 |        
    4819 |   MASTER-Kislovodsk |   C |   180 | 14.7 |        
Filter C is a clear (unfiltred) band. 


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