TITLE:   GCN CIRCULAR
NUMBER:  28928
SUBJECT: IceCube Alert 201120.41: Global MASTER-Net observations report 
DATE:    20/11/20 15:39:09 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,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile 
(Observatorio Astronomico Felix Aguilar OAFA),

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-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the IceCube Alert 201120.41 (trigger No 65785778,20h 30m 07.20s , +40d 46m 12.0s, R=4.68) errorbox  19498 sec after notice time and 19579 sec after trigger time at 2020-11-20 15:11:00 UT, with upper limit up to  18.5 mag. Observations started at twilight.  The observations began at zenith distance = 13 deg. The sun  altitude  is -10.6 deg. 

The galactic latitude b =  1 deg., longitude l = 80 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1486216

We obtain a following upper limits.  

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

   19610 | 2020-11-20 15:11:00 |      MASTER-Tavrida | (20h 22m 42.13s , +40d 01m 17.8s) |   C |    60 | 17.7 |        
   19751 | 2020-11-20 15:12:21 |      MASTER-Tavrida | (20h 25m 37.91s , +40d 46m 26.2s) |   C |   180 | 18.4 |        
   19980 | 2020-11-20 15:17:10 |      MASTER-Tavrida | (20h 27m 22.43s , +39d 57m 54.4s) |   C |    60 | 18.1 |        
   20061 | 2020-11-20 15:18:31 |      MASTER-Tavrida | (20h 37m 52.77s , +39d 59m 21.3s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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