TITLE:   GCN CIRCULAR
NUMBER:  26394
SUBJECT: LIGO/Virgo S191212q: Global MASTER-Net observations report 
DATE:    19/12/12 08:46:00 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-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the LIGO/Virgo S191212q errorbox  239 sec after trigger time at 2019-12-12 08:31:27 UT, with upper limit up to  15.9 mag. Observations started at twilight.  The observations began at zenith distance = 61 deg. The sun  altitude  is -9.5 deg. 

The galactic latitude b = -42 deg., longitude l = 156 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=10999

We obtain a following upper limits.  

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

     265 | 2019-12-12 08:31:27 |         MASTER-Amur | (02h 31m 15.74s , +14d 15m 42.6s) |   C |    50 | 15.6 |        
     339 | 2019-12-12 08:32:37 |         MASTER-Amur | (02h 31m 17.82s , +14d 15m 38.5s) |   C |    60 | 15.7 |        
     419 | 2019-12-12 08:33:56 |         MASTER-Amur | (02h 31m 11.89s , +14d 14m 37.8s) |   C |    60 | 15.6 |        
     498 | 2019-12-12 08:35:16 |         MASTER-Amur | (02h 31m 17.93s , +14d 15m 01.5s) |   C |    60 | 15.9 |        
     578 | 2019-12-12 08:36:35 |         MASTER-Amur | (02h 31m 16.08s , +14d 16m 09.1s) |   C |    60 | 15.9 |        
     698 | 2019-12-12 08:38:35 |         MASTER-Amur | (02h 31m 16.22s , +14d 15m 38.9s) |   C |    60 | 15.9 |        
Filter C is a clear (unfiltred) band. 


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