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GCN Circular 27186

Subject
LIGO/Virgo S200224ca: Global MASTER-Net observations report
Date
2020-02-25T00:08:15Z (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,  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-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 S200224ca errorbox  325 sec after trigger time at 2020-02-24 22:27:59 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 53 deg. The sun  altitude  is -53.7 deg. 

The galactic latitude b = 49 deg., longitude l = 277 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=11357

We obtain a following upper limits.  

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

     347 | 2020-02-24 22:27:51 |             MASTER- | (11h 42m 01.93s , -09d 53m 27.1s) |   C |    60 | 19.6 |        
     347 | 2020-02-24 22:27:51 |             MASTER- | (11h 34m 56.14s , -09d 54m 43.0s) |   C |    60 | 19.6 |        
     355 | 2020-02-24 22:27:59 |   MASTER-Kislovodsk | (11h 34m 39.10s , -09d 50m 29.2s) |   C |    60 | 18.2 |        
     445 | 2020-02-24 22:27:59 |   MASTER-Kislovodsk | (11h 34m 39.10s , -09d 50m 29.1s) |   C |   240 | 17.9 |  Coadd 
     355 | 2020-02-24 22:27:59 |   MASTER-Kislovodsk | (11h 43m 03.44s , -10d 17m 30.1s) |   C |    60 | 17.8 |        
     437 | 2020-02-24 22:29:10 |             MASTER- | (11h 42m 04.88s , -09d 52m 42.1s) |   C |    80 | 19.7 |        
     437 | 2020-02-24 22:29:10 |             MASTER- | (11h 34m 59.09s , -09d 53m 58.4s) |   C |    80 | 19.7 |        
     446 | 2020-02-24 22:29:19 |   MASTER-Kislovodsk | (11h 34m 36.01s , -09d 51m 35.1s) |   C |    80 | 16.8 |        
     446 | 2020-02-24 22:29:19 |   MASTER-Kislovodsk | (11h 43m 00.26s , -10d 18m 36.8s) |   C |    80 | 16.9 |        
     546 | 2020-02-24 22:30:50 |             MASTER- | (11h 41m 58.48s , -09d 53m 34.6s) |   C |   100 | 19.8 |        
     546 | 2020-02-24 22:30:50 |             MASTER- | (11h 34m 52.68s , -09d 54m 51.1s) |   C |   100 | 19.8 |        
     557 | 2020-02-24 22:31:00 |   MASTER-Kislovodsk | (11h 34m 42.29s , -09d 51m 09.1s) |   C |   100 | 15.6 |        
     557 | 2020-02-24 22:31:00 |   MASTER-Kislovodsk | (11h 43m 06.46s , -10d 18m 10.4s) |   C |   100 | 15.8 |        
     781 | 2020-02-24 22:34:24 |   MASTER-Kislovodsk | (11h 34m 40.04s , -09d 37m 01.3s) |   C |   140 | 15.9 |        
     781 | 2020-02-24 22:34:24 |   MASTER-Kislovodsk | (11h 43m 04.25s , -10d 04m 06.0s) |   C |   140 | 15.8 |        
     820 | 2020-02-24 22:34:59 |             MASTER- | (11h 42m 01.97s , -09d 40m 05.0s) |   C |   150 | 19.9 |        
     820 | 2020-02-24 22:34:59 |             MASTER- | (11h 34m 56.44s , -09d 41m 21.8s) |   C |   150 | 19.9 |        
     966 | 2020-02-24 22:37:10 |   MASTER-Kislovodsk | (11h 44m 13.13s , -09d 46m 09.6s) |   C |   180 | 14.8 |        
     966 | 2020-02-24 22:37:10 |   MASTER-Kislovodsk | (11h 35m 57.55s , -09d 19m 57.4s) |   C |   180 | 14.2 |        
    1005 | 2020-02-24 22:37:48 |             MASTER- | (11h 42m 05.26s , -09d 40m 50.2s) |   C |   180 | 19.5 |        
    1005 | 2020-02-24 22:37:48 |             MASTER- | (11h 34m 59.65s , -09d 42m 07.0s) |   C |   180 | 19.9 |        
    1167 | 2020-02-24 22:40:31 |   MASTER-Kislovodsk | (11h 44m 12.27s , -09d 45m 20.2s) |   C |   180 | 13.1 |        
    1167 | 2020-02-24 22:40:31 |   MASTER-Kislovodsk | (11h 35m 56.78s , -09d 19m 09.3s) |   C |   180 | 13.3 |        
    1204 | 2020-02-24 22:41:08 |             MASTER- | (11h 42m 01.99s , -09d 39m 27.2s) |   C |   180 | 19.5 |        
    1204 | 2020-02-24 22:41:08 |             MASTER- | (11h 34m 56.37s , -09d 40m 44.3s) |   C |   180 | 19.9 |        
    1368 | 2020-02-24 22:43:52 |   MASTER-Kislovodsk | (11h 44m 19.63s , -09d 46m 23.8s) |   C |   180 | 16.4 |        
    1368 | 2020-02-24 22:43:52 |   MASTER-Kislovodsk | (11h 36m 04.16s , -09d 20m 13.2s) |   C |   180 | 16.1 |        
    1404 | 2020-02-24 22:44:27 |             MASTER- | (11h 42m 01.96s , -09d 40m 48.7s) |   C |   180 | 19.5 |        
    1404 | 2020-02-24 22:44:27 |             MASTER- | (11h 34m 56.31s , -09d 42m 06.0s) |   C |   180 | 19.9 |        
Filter C is a clear (unfiltred) band. 


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