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GCN Circular 29123

Subject
IceCube Alert 201222.04: Global MASTER-Net observations report
Date
2020-12-22T09:00:08Z (3 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),

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) was pointed to the IceCube Alert 201222.04 (trigger No 73718836,13h 46m 33.60s , +13d 28m 55.2s, R=0.51) errorbox  26456 sec after notice time and 26734 sec after trigger time at 2020-12-22 08:21:51 UT, with upper limit up to  17.7 mag. Observations started at twilight.  The observations began at zenith distance = 71 deg. The sun  altitude  is -12.8 deg. 

The galactic latitude b = 71 deg., longitude l = 350 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1508280

We obtain a following upper limits.  

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

   26825 | 2020-12-22 08:21:51 |         MASTER-OAFA | (13h 44m 23.40s , +12d 50m 56.5s) |   C |   180 | 17.7 |        
   27254 | 2020-12-22 08:30:00 |         MASTER-OAFA | (13h 39m 17.36s , +13d 25m 21.9s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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