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GCN Circular 34067

Subject
Swift GRB 230622A: Global MASTER-Net observations report
Date
2023-06-22T19:12:52Z (a year 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, 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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the Swift GRB 230622A ( A. Melandri et al., GCN 34058) errorbox  24809 sec after notice time and 25243 sec after trigger time at 2023-06-22 17:05:04 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 84 deg. The sun  altitude  is -17.1 deg. 

The galactic latitude b = -23 deg., longitude l =  6 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2226200

We obtain a following upper limits.  

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

     497 |             MASTER- |   C |    90 | 16.9 |        
     617 |             MASTER- |   C |   110 | 17.2 |        
     762 |             MASTER- |   C |   140 | 17.3 |        
     937 |             MASTER- |   C |   170 | 17.2 |        
    1132 |             MASTER- |   C |   180 | 17.3 |        
    1332 |             MASTER- |   C |   180 | 17.2 |        
    1532 |             MASTER- |   C |   180 | 16.6 |        
    1732 |             MASTER- |   C |   180 | 17.3 |        
    1931 |             MASTER- |   C |   180 | 17.3 |        
    2132 |             MASTER- |   C |   180 | 17.3 |        
    2356 |             MASTER- |   C |   180 | 17.3 |        
    2556 |             MASTER- |   C |   180 | 17.3 |        
    2757 |             MASTER- |   C |   180 | 17.3 |        
    2957 |             MASTER- |   C |   180 | 17.2 |        
    3296 |             MASTER- |   C |   180 | 17.3 |        
   25333 |         MASTER-SAAO |   C |   180 | 16.9 |        
   25533 |         MASTER-SAAO |   C |   180 | 17.1 |        
Filter C is a clear (unfiltred) band. 


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


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