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GCN Circular 27477

Subject
Fermi trigger No 607537834: Global MASTER-Net observations report
Date
2020-04-02T17:15:07Z (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),

H.Levato 
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE),

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 GRB200402.69 (trigger No 607537834,12h 40m 21.60s , -06d 36m 00.0s, R=6.5) errorbox  1354 sec after notice time and 1382 sec after trigger time at 2020-04-02 16:53:32 UT, with upper limit up to  18.5 mag. The observations began at zenith distance = 61 deg. The sun  altitude  is -33.7 deg. 

The galactic latitude b = 56 deg., longitude l = 299 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1328400

We obtain a following upper limits.  

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

    1472 | 2020-04-02 16:53:32 |        MASTER-Tunka | (12h 54m 32.61s , -10d 03m 51.8s) |  P| |   180 | 18.4 |        
    1672 | 2020-04-02 16:56:51 |        MASTER-Tunka | (12h 54m 38.75s , -10d 04m 55.1s) |  P| |   180 | 18.4 |        
    1872 | 2020-04-02 17:00:11 |        MASTER-Tunka | (12h 54m 32.29s , -10d 05m 55.3s) |  P| |   180 | 18.4 |        
    2072 | 2020-04-02 17:03:31 |        MASTER-Tunka | (12h 54m 39.51s , -10d 05m 38.4s) |  P| |   180 | 18.5 |        


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