TITLE:   GCN CIRCULAR
NUMBER:  27124
SUBJECT: Swift GRB200219.32: Global MASTER-Net observations report 
DATE:    20/02/19 07:52:12 GMT
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-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 GRB200219.32 (trigger No 957271,22h 50m 34.56s , -59d 06m 28.8s, R=0.05) errorbox  74 sec after trigger time at 2020-02-19 07:38:03 UT, with upper limit up to  16.5 mag. The observations began at zenith distance = 87 deg. The sun  altitude  is -31.2 deg. 

The galactic latitude b = -52 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1292468

We obtain a following upper limits.  

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

      79 |         MASTER-OAFA |   C |    10 | 14.2 |        
     125 |         MASTER-OAFA |   C |    20 | 15.2 |        
     188 |         MASTER-OAFA |   C |    30 | 15.1 |        
     263 |         MASTER-OAFA |   C |    50 | 15.8 |        
     439 |         MASTER-OAFA |   C |    80 | 16.5 |        
     567 |         MASTER-OAFA |   C |   100 | 16.1 |        
Filter C is a clear (unfiltred) band. 


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