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GCN Circular 25609

Subject
LIGO/Virgo S190901ap Global MASTER-Net observations report
Date
2019-09-02T03:58:08Z (5 years ago)
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-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) started inspect of the LIGO/Virgo S190901ap errorbox  7875 sec after trigger time at 2019-09-02 01:42:16 UT, with upper limit up to  19.2 mag. The observations began at zenit distance = 69 deg. The sun  altitude  is -43.8 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/ligo_1.php?id=10759

We obtain a following upper limits.  

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

    7966 | 2019-09-02 01:42:16 |         MASTER-OAFA | (01h 33m 01.151s , -36d 05m 50.60s) |   C |   180 | 17.5 |        
    8220 | 2019-09-02 01:46:30 |         MASTER-OAFA | (01h 30m 42.740s , -34d 05m 28.87s) |   C |   180 | 19.3 |        
    9275 | 2019-09-02 02:04:06 |         MASTER-OAFA | (01h 42m 53.530s , -36d 05m 18.14s) |   C |   180 | 16.4 |        
    9723 | 2019-09-02 02:11:33 |         MASTER-OAFA | (01h 40m 22.971s , -34d 05m 40.56s) |   C |   180 | 16.4 |        
   11293 | 2019-09-02 02:37:44 |         MASTER-OAFA | (02h 34m 46.030s , -32d 04m 54.73s) |   C |   180 | 18.4 |        
   11968 | 2019-09-02 02:48:58 |         MASTER-OAFA | (02h 53m 39.194s , -32d 04m 16.95s) |   C |   180 | 18.6 |        
   12192 | 2019-09-02 02:52:43 |         MASTER-OAFA | (02h 46m 42.695s , -28d 04m 41.93s) |   C |   180 | 18.5 |        
   12419 | 2019-09-02 02:56:29 |         MASTER-OAFA | (02h 55m 48.250s , -28d 04m 13.09s) |   C |   180 | 18.4 |        
   12644 | 2019-09-02 03:00:15 |         MASTER-OAFA | (02h 59m 15.321s , -30d 04m 29.16s) |   C |   180 | 18.4 |        
   12874 | 2019-09-02 03:04:05 |         MASTER-OAFA | (02h 52m 39.948s , -26d 04m 15.46s) |   C |   180 | 18.6 |        
   13324 | 2019-09-02 03:11:35 |         MASTER-OAFA | (03h 04m 50.900s , -28d 04m 21.90s) |   C |   180 | 18.5 |        
   13778 | 2019-09-02 03:19:09 |         MASTER-OAFA | (03h 08m 31.010s , -30d 03m 57.77s) |   C |   180 | 18.5 |        
   14227 | 2019-09-02 03:26:37 |         MASTER-OAFA | (03h 01m 32.460s , -26d 04m 24.25s) |   C |   180 | 18.9 |        
   15137 | 2019-09-02 03:41:48 |         MASTER-OAFA | (02h 40m 44.681s , -30d 04m 44.85s) |   C |   180 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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