TITLE:   GCN CIRCULAR
NUMBER:  31245
SUBJECT: IceCube Alert 211216.30: Global MASTER-Net observations report 
DATE:    21/12/16 15:13:06 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, 
D. Vlasenko, G.Antipov, D.Zimnukhov, V.Senik, T.Pogrosheva, E.Minkina,
A.Chasovnikov, V.Topolev, V.Grinshpun, 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
(Irkutsk State University, API),

A. Tlatov, D. Dormidontov 
(Kislovodsk Solar Station of the Pulkovo Observatory),

A. Gabovich, V.Yurkov 
(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) was pointed to the IceCube Alert 211216.30 (trigger No 348073,21h 05m 28.32s , +15d 55m 01.2s, R=0.55) errorbox  27392 sec after notice time and 27507 sec after trigger time at 2021-12-16 14:46:05 UT, with upper limit up to  16.6 mag. Observations started at twilight.  The observations began at zenith distance = 39 deg. The sun  altitude  is -12.2 deg. 

The galactic latitude b = -21 deg., longitude l = 65 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1816191

We obtain a following upper limits.  

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

   27598 | 2021-12-16 14:46:05 |   MASTER-Kislovodsk | (21h 05m 47.09s , +15d 56m 54.7s) |   C |   180 | 16.6 |        
   27598 | 2021-12-16 14:46:05 |   MASTER-Kislovodsk | (21h 05m 31.20s , +16d 19m 48.2s) |   C |   180 | 15.6 |        
   28187 | 2021-12-16 14:56:54 |   MASTER-Kislovodsk | (21h 08m 10.18s , +16d 25m 54.5s) |   C |    60 | 15.7 |        
   28187 | 2021-12-16 14:56:54 |   MASTER-Kislovodsk | (21h 03m 34.62s , +16d 48m 26.1s) |   C |    60 | 15.0 |        
Filter C is a clear (unfiltred) band. 


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