TITLE:   GCN CIRCULAR
NUMBER:  32444
SUBJECT: Swift GRB220806.76: Global MASTER-Net observations report 
DATE:    22/08/06 18:16:34 GMT
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 GRB220806.76 (trigger No 1119268,17h 23m 29.52s , -26d 01m 22.8s, R=0.05) errorbox  30 sec after notice time and 47 sec after trigger time at 2022-08-06 18:09:26 UT, with upper limit up to  17.0 mag. The observations began at zenith distance = 13 deg. The sun  altitude  is -26.5 deg. 

The galactic latitude b =  5 deg., longitude l =  0 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2051076

We obtain a following upper limits.  

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

      52 |         MASTER-SAAO |   C |    10 | 16.7 |        
      73 |         MASTER-SAAO |   C |    10 | 16.7 |        
     101 |         MASTER-SAAO |   C |    20 | 16.8 |        
     134 |         MASTER-SAAO |   C |    20 | 16.8 |        
     171 |         MASTER-SAAO |   C |    30 | 17.0 |        
Filter C is a clear (unfiltred) band. 


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