[vsnet-grb-info 24730] IceCube Alert 200120.78: Global MASTER-Net observations report

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  26829
SUBJECT: IceCube Alert 200120.78: Global MASTER-Net observations report 
DATE:    20/01/20 19:00:22 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,  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-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 IceCube Alert 200120.78 (trigger No 43767651,04h 30m 57.12s , -14d 35m 13.2s, R=0.51) errorbox  67 sec after trigger time at 2020-01-20 18:49:26 UT, with upper limit up to  19.0 mag. Observations started at twilight.  The observations began at zenith distance = 18 deg. The sun  altitude  is -12.4 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the IceCube Alert 200120.78 errorbox  70 sec after trigger time at 2020-01-20 18:49:29 UT, with upper limit up to  19.9 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -50.9 deg. 

The galactic latitude b = -37 deg., longitude l = 211 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1264643

We obtain a following upper limits.  

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

     158 | 2020-01-20 18:49:26 |         MASTER-SAAO | (04h 28m 46.35s , -14d 29m 07.8s) |   C |   180 | 19.0 |        
     161 | 2020-01-20 18:49:29 |   MASTER-Kislovodsk | (04h 31m 14.62s , -14d 32m 24.1s) |   C |   180 | 19.8 |        
     161 | 2020-01-20 18:49:29 |   MASTER-Kislovodsk | (04h 31m 22.22s , -14d 05m 31.4s) |   C |   180 | 19.7 |        
     359 | 2020-01-20 18:52:47 |         MASTER-SAAO | (04h 28m 48.69s , -14d 29m 11.3s) |   C |   180 | 18.5 |        
     362 | 2020-01-20 18:52:50 |   MASTER-Kislovodsk | (04h 31m 16.86s , -14d 33m 13.3s) |   C |   180 | 19.9 |        
     362 | 2020-01-20 18:52:50 |   MASTER-Kislovodsk | (04h 31m 24.63s , -14d 06m 19.0s) |   C |   180 | 19.7 |        
Filter C is a clear (unfiltred) band. 


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