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GCN Circular 28491

Subject
Fermi trigger No 622618714: Global MASTER-Net observations report
Date
2020-09-24T12:15:14Z (4 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, 
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov,  D. Cheryasov
(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, O.Ershova 
(Irkutsk State University, API),

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

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




MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB200924.24 (trigger No 622618714,21h 19m 40.80s , +08d 42m 36.0s, R=4.88) errorbox  8518 sec after notice time and 23051 sec after trigger time at 2020-09-24 12:02:40 UT, with upper limit up to  17.5 mag. Observations started at twilight.  The observations began at zenith distance = 50 deg. The sun  altitude  is -10.5 deg. 

The galactic latitude b = -28 deg., longitude l = 61 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1448090

We obtain a following upper limits.  

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

   23081 | 2020-09-24 12:02:40 |        MASTER-Tunka | (21h 11m 28.70s , +07d 41m 38.3s) |   C |    60 | 17.3 |        
   23161 | 2020-09-24 12:04:00 |        MASTER-Tunka | (21h 18m 35.74s , +09d 43m 06.5s) |   C |    60 | 17.3 |        
   23242 | 2020-09-24 12:05:21 |        MASTER-Tunka | (21h 27m 43.45s , +07d 42m 37.0s) |   C |    60 | 17.0 |        
   23321 | 2020-09-24 12:06:40 |        MASTER-Tunka | (21h 10m 55.24s , +11d 43m 34.6s) |   C |    60 | 17.4 |        
   23400 | 2020-09-24 12:07:59 |        MASTER-Tunka | (21h 22m 05.64s , +05d 41m 19.1s) |   C |    60 | 17.5 |        
   23480 | 2020-09-24 12:09:19 |        MASTER-Tunka | (21h 11m 34.72s , +07d 41m 42.3s) |   C |    60 | 17.2 |        
Filter C is a clear (unfiltred) band. 


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