TITLE:   GCN CIRCULAR
NUMBER:  25354
SUBJECT: LIGO/Virgo S190814bv Global MASTER-Net observations report 
DATE:    19/08/15 22:05:15 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 
(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-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the LIGO/Virgo S190814bv errorbox  92 sec after trigger time at 2019-08-15 21:40:44 UT, with upper limit up to  17.6 mag. The observations began at zenit distance = 78 deg. The sun  altitude  is -32.7 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the LIGO/Virgo S190814bv errorbox  174 sec after trigger time at 2019-08-15 21:42:06 UT, with upper limit up to  15.5 mag. The observations began at zenit distance = 64 deg. The sun  altitude  is -67.2 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/ligo_1.php?id=10709

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

     183 | 2019-08-15 21:40:44 |   MASTER-Kislovodsk | (  0h 47m 29.97s , -25d 48m 07.68s) |   C |   180 | 17.2 |        
     183 | 2019-08-15 21:40:44 |   MASTER-Kislovodsk | (  0h 56m 30.50s , -26d 16m 00.82s) |   C |   180 | 17.1 |        
     264 | 2019-08-15 21:42:06 |         MASTER-SAAO | (  1h 51m 03.49s , -34d  3m 17.86s) |   C |   180 | 15.5 |        
     401 | 2019-08-15 21:44:22 |   MASTER-Kislovodsk | (  0h 38m 07.88s , -24d 15m 24.80s) |   C |   180 | 17.6 |        
     401 | 2019-08-15 21:44:22 |   MASTER-Kislovodsk | (  0h 29m 14.72s , -23d 47m 50.58s) |   C |   180 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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