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GCN Circular 24929

Subject
Swift GRB190631. Global MASTER-Net observations report
Date
2019-07-01T00:55:20Z (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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Swift GRB190631. (trigger No 912239, 19h 35m 37.92s , -32d 45m 03.60s, R=0.05) errorbox  50 sec after trigger time at 2019-06-30 23:53:49 UT, with upper limit up to  17.8 mag. Observations started at twilight.  The observations began at zenit distance = 78 deg. The sun  altitude  is -16.8 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB190631. errorbox  56 sec after trigger time at 2019-06-30 23:53:55 UT, with upper limit up to  17.6 mag. The observations began at zenit distance = 71 deg. The sun  altitude  is -27.2 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) was pointed to the Swift GRB190631. errorbox  83 sec after trigger time at 2019-06-30 23:54:22 UT, with upper limit up to  18.8 mag. The observations began at zenit distance = 68 deg. The sun  altitude  is -36.0 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=1061706

We obtain a following upper limits.  

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

      55 |      MASTER-Tavrida |   C |    10 | 16.5 |        
      61 |         MASTER-OAFA |   C |    10 | 16.5 |        
      94 |          MASTER-IAC |  P| |    20 | 17.5 |        
      94 |          MASTER-IAC |  P- |    20 | 17.2 |        
      94 |      MASTER-Tavrida |   C |    20 | 17.2 |        
     117 |         MASTER-OAFA |   C |    20 | 17.0 |        
     143 |      MASTER-Tavrida |   C |    30 | 17.4 |        
     150 |          MASTER-IAC |  P| |    30 | 17.8 |        
     150 |          MASTER-IAC |  P- |    30 | 17.5 |        
     184 |         MASTER-OAFA |   C |    30 | 17.2 |        
     202 |      MASTER-Tavrida |   C |    40 | 17.6 |        
     204 |          MASTER-IAC |  P- |    40 | 17.6 |        
     204 |          MASTER-IAC |  P| |    40 | 18.1 |        
     267 |         MASTER-OAFA |   C |    50 | 17.5 |        
     269 |          MASTER-IAC |  P| |    50 | 18.3 |        
     269 |          MASTER-IAC |  P- |    50 | 17.9 |        
     271 |      MASTER-Tavrida |   C |    50 | 17.8 |        
     343 |          MASTER-IAC |  P| |    60 | 18.5 |        
     343 |          MASTER-IAC |  P- |    60 | 18.1 |        
     368 |         MASTER-OAFA |   C |    70 | 17.6 |        
     434 |          MASTER-IAC |  P- |    80 | 18.3 |        
     435 |          MASTER-IAC |  P| |    80 | 18.7 |        
     544 |          MASTER-IAC |  P- |   100 | 18.5 |        
     544 |          MASTER-IAC |  P| |   100 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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