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GCN Circular 32175

Subject
MAXI GRB220607.41: Global MASTER-Net observations report
Date
2022-06-07T22:34:18Z (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) started inspect of the MAXI GRB220607.41 (trigger No 737849998,18h 16m 52.80s , -19d 30m 39.6s, R=1) errorbox  13120 sec after notice time and 28651 sec after trigger time at 2022-06-07 17:47:31 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -26.1 deg. 

The galactic latitude b = -2 deg., longitude l = 12 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1999247

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   28682 | 2022-06-07 17:47:31 |         MASTER-SAAO | (18h 17m 30.22s , -21d 42m 06.7s) |   C |    60 | 12.1 |        
   29438 | 2022-06-07 17:59:07 |         MASTER-SAAO | (18h 16m 21.13s , -20d 02m 58.1s) |   C |   180 | 13.1 |        
   29651 | 2022-06-07 18:02:40 |         MASTER-SAAO | (18h 14m 46.79s , -19d 38m 15.8s) |   C |   180 | 12.8 |        
   29862 | 2022-06-07 18:06:12 |         MASTER-SAAO | (18h 14m 46.78s , -19d 39m 36.3s) |   C |   180 | 13.0 |        
   30695 | 2022-06-07 18:21:05 |         MASTER-SAAO | (18h 17m 29.42s , -21d 44m 05.8s) |   C |    60 | 11.9 |        
   30835 | 2022-06-07 18:22:25 |         MASTER-SAAO | (18h 16m 17.63s , -20d 00m 36.5s) |   C |   180 | 13.2 |        
   31047 | 2022-06-07 18:25:57 |         MASTER-SAAO | (18h 16m 17.47s , -20d 02m 15.6s) |   C |   180 | 13.1 |        
   31532 | 2022-06-07 18:35:01 |         MASTER-SAAO | (18h 11m 30.05s , -19d 48m 46.6s) |   C |    60 | 12.6 |        
   31622 | 2022-06-07 18:36:31 |         MASTER-SAAO | (18h 20m 00.24s , -19d 50m 04.6s) |   C |    60 | 13.0 |        
   31702 | 2022-06-07 18:37:51 |         MASTER-SAAO | (18h 17m 31.38s , -21d 42m 36.6s) |   C |    60 | 12.1 |        
   32016 | 2022-06-07 18:42:05 |         MASTER-SAAO | (18h 16m 19.23s , -20d 01m 52.3s) |   C |   180 | 12.9 |        
   32735 | 2022-06-07 18:55:04 |         MASTER-SAAO | (18h 19m 59.00s , -19d 49m 07.8s) |   C |    60 | 13.1 |        
   33661 | 2022-06-07 19:09:30 |         MASTER-SAAO | (18h 16m 15.30s , -20d 01m 36.1s) |   C |   180 | 12.8 |        
   33872 | 2022-06-07 19:13:02 |         MASTER-SAAO | (18h 16m 15.16s , -20d 02m 40.6s) |   C |   180 | 13.2 |        
   45014 | 2022-06-07 22:18:43 |         MASTER-SAAO | (18h 15m 38.53s , -19d 36m 40.8s) |   C |   180 | 19.2 |        
Filter C is a clear (unfiltred) band. 


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