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GCN Circular 25681

Subject
Fermi trigger No 589487114 Global MASTER-Net observations report
Date
2019-09-06T19:31:33Z (5 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 
(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-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 GRB190906.77 (trigger No 589487114,11h 27m 21.600s , -71d 34m 12.00s, R=3.5) errorbox  546 sec after notice time and 580 sec after trigger time at 2019-09-06 18:34:49 UT, with upper limit up to  18.7 mag. The observations began at zenit distance = 67 deg. The sun  altitude  is -28.2 deg. 

The galactic latitude b = -60 deg., longitude l = 98 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1128094

We obtain a following upper limits.  

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

     641 | 2019-09-06 18:34:49 |         MASTER-SAAO | (11h 15m 24.879s , -71d 28m 52.97s) |   C |   120 | 18.2 |        
     806 | 2019-09-06 18:34:49 |         MASTER-SAAO | (11h 15m 24.886s , -71d 28m 52.97s) |   C |   450 | 18.7 |  Coadd 
     803 | 2019-09-06 18:37:17 |         MASTER-SAAO | (11h 15m 06.056s , -71d 28m 41.89s) |   C |   150 | 18.3 |        
     997 | 2019-09-06 18:40:15 |         MASTER-SAAO | (11h 15m 05.071s , -71d 28m 40.26s) |   C |   180 | 18.2 |        
    1205 | 2019-09-06 18:43:43 |         MASTER-SAAO | (11h 15m 03.933s , -71d 28m 39.15s) |   C |   180 | 18.3 |        
Filter C is a clear (unfiltred) band. 


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