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GCN Circular 24150

Subject
Swift GRB190422.96 Global MASTER-Net observations report
Date
2019-04-23T00:31:21Z (5 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, V.V.Chazov, D. Vlasenko
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University

A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory

K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
Irkutsk State University

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

R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)

Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias

D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory



MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB190422.96 ( 12h  8m 29.76s , -60d 14m 16.80s, R=0.05) errorbox  128 sec after trigger time at 2019-04-22 22:57:37 UT, with upper limit up to  17.7 mag. Observations started at twilight.  The observations began at zenit distance = 47 deg. The sun  altitude  is -11.4 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=1000655

We obtain a following upper limits.  

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

     138 |         MASTER-OAFA |   C |    20 | 16.4 |        
     207 |         MASTER-OAFA |   C |    40 | 16.7 |        
     290 |         MASTER-OAFA |   C |    50 | 16.8 |        
     392 |         MASTER-OAFA |   C |    70 | 17.0 |        
     512 |         MASTER-OAFA |   C |    90 | 17.2 |        
     656 |         MASTER-OAFA |   C |   120 | 17.4 |        
     830 |         MASTER-OAFA |   C |   150 | 17.5 |        
    1034 |         MASTER-OAFA |   C |   180 | 17.6 |        
    1252 |         MASTER-OAFA |   C |   180 | 17.6 |        
    1471 |         MASTER-OAFA |   C |   180 | 17.7 |        
    1690 |         MASTER-OAFA |   C |   180 | 17.7 |        
    1909 |         MASTER-OAFA |   C |   180 | 17.7 |        
    2130 |         MASTER-OAFA |   C |   180 | 17.7 |        
    2348 |         MASTER-OAFA |   C |   180 | 17.7 |        
    2567 |         MASTER-OAFA |   C |   180 | 17.7 |        
Filter C is a clear (unfiltred) band. 


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