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GCN Circular 32210

Subject
Fermi GRB 220617A: Global MASTER-Net observations report
Date
2022-06-17T19:30:35Z (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, 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 Fermi GRB 220617A ( Fermi GBM team, GCN 32209) errorbox  565 sec after notice time and 600 sec after trigger time at 2022-06-17 18:41:13 UT, with upper limit up to  17.8 mag. The observations began at zenith distance = 72 deg. The sun  altitude  is -37.2 deg. 

The galactic latitude b = 56 deg., longitude l = 216 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2008774

We obtain a following upper limits.  

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

     661 | 2022-06-17 18:41:13 |         MASTER-SAAO | (10h 22m 17.52s , +21d 18m 28.6s) |   C |   120 | 16.9 |        
     826 | 2022-06-17 18:41:13 |         MASTER-SAAO | (10h 22m 18.15s , +21d 18m 33.0s) |   C |   450 | 17.8 |  Coadd 
     843 | 2022-06-17 18:44:01 |         MASTER-SAAO | (10h 22m 23.41s , +21d 20m 08.9s) |   C |   150 | 17.2 |        
    1040 | 2022-06-17 18:47:02 |         MASTER-SAAO | (10h 22m 18.64s , +21d 19m 26.5s) |   C |   180 | 17.1 |        
    1914 | 2022-06-17 19:02:36 |         MASTER-SAAO | (10h 18m 16.82s , +22d 17m 11.7s) |   C |    60 | 15.8 |        
    2005 | 2022-06-17 19:04:08 |         MASTER-SAAO | (10h 26m 56.39s , +22d 16m 07.7s) |   C |    60 | 16.2 |        
    2093 | 2022-06-17 19:05:35 |         MASTER-SAAO | (10h 10m 34.70s , +20d 21m 52.6s) |   C |    60 | 14.0 |        
    2184 | 2022-06-17 19:07:06 |         MASTER-SAAO | (10h 18m 58.19s , +20d 23m 01.3s) |   C |    60 | 16.0 |        
    2884 | 2022-06-17 19:18:46 |         MASTER-SAAO | (10h 26m 42.09s , +20d 21m 46.5s) |   C |    60 | 14.8 |        
    2976 | 2022-06-17 19:20:18 |         MASTER-SAAO | (10h 35m 11.11s , +20d 23m 25.2s) |   C |    60 | 16.1 |        
Filter C is a clear (unfiltred) band. 


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