[vsnet-grb-info 22984] Swift GRB190718.2 Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  25083
SUBJECT: Swift GRB190718.2 Global MASTER-Net observations report 
DATE:    19/07/18 05:28:22 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at 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 Swift GRB190718.2 (trigger No 915091, 22h 26m 07.44s , -41d 13m 15.60s, R=0.05) errorbox  18 sec after notice time and 44 sec after trigger time at 2019-07-18 04:41:59 UT, with upper limit up to  17.0 mag. Observations started at twilight.  The observations began at zenit distance = 40 deg. The sun  altitude  is -11.6 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB190718.2 errorbox  32 sec after notice time and 57 sec after trigger time at 2019-07-18 04:42:12 UT, with upper limit up to  17.1 mag. The observations began at zenit distance = 33 deg. The sun  altitude  is -80.1 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) was pointed to the Swift GRB190718.2 errorbox  55 sec after notice time and 80 sec after trigger time at 2019-07-18 04:42:35 UT, with upper limit up to  16.8 mag. The observations began at zenit distance = 71 deg. The sun  altitude  is -18.8 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=1077929

We obtain a following upper limits.  

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

      49 |         MASTER-SAAO |  P\ |    10 | 15.7 |        
      64 |         MASTER-SAAO |  P\ |    40 | 16.5 |  Coadd 
      63 |         MASTER-OAFA |   C |    10 | 15.4 |        
      88 |         MASTER-OAFA |   C |    60 | 16.4 |  Coadd 
      75 |         MASTER-SAAO |  P\ |    10 | 15.7 |        
      86 |          MASTER-IAC |  P| |    10 | 16.2 |        
     105 |         MASTER-SAAO |  P\ |    20 | 16.1 |        
     120 |         MASTER-OAFA |   C |    20 | 15.7 |        
     139 |          MASTER-IAC |  P| |    20 | 16.8 |        
     147 |         MASTER-SAAO |  P\ |    30 | 16.3 |        
     192 |         MASTER-SAAO |  P\ |   120 | 16.9 |  Coadd 
     186 |         MASTER-OAFA |   C |    30 | 15.8 |        
     196 |         MASTER-SAAO |  P\ |    40 | 16.3 |        
     268 |         MASTER-SAAO |  P\ |    50 | 16.3 |        
     271 |         MASTER-OAFA |   C |    50 | 16.1 |        
     339 |         MASTER-SAAO |  P\ |    60 | 16.3 |        
     429 |         MASTER-SAAO |  P\ |   240 | 17.0 |  Coadd 
     374 |         MASTER-OAFA |   C |    70 | 16.2 |        
     430 |         MASTER-SAAO |  P\ |    80 | 16.3 |        
     497 |         MASTER-OAFA |   C |    90 | 16.3 |        
     536 |         MASTER-SAAO |  P\ |   100 | 16.3 |        
     643 |         MASTER-OAFA |   C |   120 | 16.5 |        
     808 |         MASTER-OAFA |   C |   450 | 17.1 |  Coadd 
     664 |         MASTER-SAAO |  P\ |   120 | 16.2 |        
     815 |         MASTER-SAAO |  P\ |   150 | 15.9 |        
     821 |         MASTER-OAFA |   C |   150 | 16.5 |        
    1027 |         MASTER-OAFA |   C |   180 | 16.6 |        
    1247 |         MASTER-OAFA |   C |   180 | 16.5 |        
    1468 |         MASTER-OAFA |   C |   180 | 16.5 |        
    1691 |         MASTER-OAFA |   C |   180 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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