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GCN Circular 25527

Subject
Integral GRB190828.78 Global MASTER-Net observations report
Date
2019-08-28T19:39:17Z (6 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) was pointed to the Integral GRB190828.78 (trigger No 8364,16h 48m 51.120s , -24d 35m 06.00s, R=0.0516667) errorbox  20 sec after notice time and 31 sec after trigger time at 2019-08-28 18:49:11 UT, with upper limit up to  19.2 mag. The observations began at zenit distance = 25 deg. The sun  altitude  is -32.4 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Integral GRB190828.78 errorbox  30 sec after notice time and 41 sec after trigger time at 2019-08-28 18:49:21 UT, with upper limit up to  16.3 mag. The observations began at zenit distance = 78 deg. The sun  altitude  is -23.3 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=1118498

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      37 |         MASTER-SAAO |  P\ |    10 | 17.2 |        
      52 |         MASTER-SAAO |  P\ |    40 | 18.0 |  Coadd 
      46 |      MASTER-Tavrida |   C |    10 | 15.9 |        
      61 |      MASTER-Tavrida |   C |    40 | 16.3 |  Coadd 
      63 |         MASTER-SAAO |  P\ |    10 | 17.1 |        
      80 |      MASTER-Tavrida |   C |    10 | 15.6 |        
      93 |         MASTER-SAAO |  P\ |    20 | 17.7 |        
     119 |      MASTER-Tavrida |   C |    20 | 16.0 |        
     130 |         MASTER-SAAO |  P\ |    20 | 17.8 |        
     165 |         MASTER-SAAO |  P\ |    90 | 18.6 |  Coadd 
     171 |         MASTER-SAAO |  P\ |    30 | 18.0 |        
     222 |         MASTER-SAAO |  P\ |    40 | 18.3 |        
     283 |         MASTER-SAAO |  P\ |    50 | 18.4 |        
     353 |         MASTER-SAAO |  P\ |   190 | 19.1 |  Coadd 
     354 |         MASTER-SAAO |  P\ |    60 | 18.6 |        
     680 |         MASTER-SAAO |  P\ |   370 | 19.2 |  Coadd 
Filter C is a clear (unfiltred) band. 


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