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GCN Circular 28164

Subject
IceCube Alert 200728.35: Global MASTER-Net observations report
Date
2020-07-29T04:39:09Z (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-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 200728.35 (trigger No 10548129,07h 50m 13.20s , -24d 50m 52.8s, R=0.51) errorbox  70580 sec after notice time and 70645 sec after trigger time at 2020-07-29 03:55:17 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -20.1 deg. 

The galactic latitude b =  1 deg., longitude l = 242 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1409244

We obtain a following upper limits.  

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

   70735 | 2020-07-29 03:55:17 |         MASTER-SAAO | (07h 50m 00.35s , -24d 45m 50.2s) |   C |   180 | 18.3 |        
   70735 | 2020-07-29 03:55:17 |         MASTER-SAAO | (07h 50m 58.29s , -24d 45m 33.9s) |   C |   180 | 17.1 |        
   71015 | 2020-07-29 03:59:56 |         MASTER-SAAO | (07h 49m 59.89s , -24d 46m 17.7s) |   C |   180 | 17.9 |        
   71015 | 2020-07-29 03:59:56 |         MASTER-SAAO | (07h 50m 57.46s , -24d 46m 03.2s) |   C |   180 | 17.8 |        
Filter C is a clear (unfiltred) band. 


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