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GCN Circular 32524

Swift GRB220907.59: Global MASTER-Net observations report
2022-09-07T14:14:10Z (2 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, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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),

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),

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

MASTER-Tunka robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB220907.59 (trigger No 1123129,17h 55m 28.80s , -20d 18m 55.1s, R=0.05) errorbox  67 sec after notice time and 83 sec after trigger time at 2022-09-07 14:06:49 UT, with upper limit up to  13.9 mag. The observations began at zenith distance = 75 deg. The sun  altitude  is -21.4 deg. 

The galactic latitude b =  2 deg., longitude l =  9 deg.

Real time updated cover map and OT discovered available here:

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment

      85 |        MASTER-Tunka |   C |     1 | 13.9 |        
      91 |        MASTER-Tunka |   C |     1 | 13.8 |        
      97 |        MASTER-Tunka |   C |     1 | 13.8 |        
     103 |        MASTER-Tunka |   C |     1 | 13.9 |        
     109 |        MASTER-Tunka |   C |     1 | 13.9 |        
     115 |        MASTER-Tunka |   C |     1 | 13.8 |        
Filter C is a clear (unfiltred) band. 

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