TITLE:   GCN CIRCULAR
NUMBER:  32522
SUBJECT: IceCube Alert 220907.28: Global MASTER-Net observations report 
DATE:    22/09/07 11:13:14 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, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez 
(INAOE, Guillermo Haro Astrophysics Observatory),

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

A. Gabovich, V.Yurkov 
(Blagoveschensk Educational State University)


MASTER-Amur robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) was pointed to the IceCube Alert 220907.28 (trigger No 70165712,14h 54m 08.64s , +45d 02m 56.4s, R=0.64) errorbox  14976 sec after notice time and 15021 sec after trigger time at 2022-09-07 10:57:09 UT, with upper limit up to  16.1 mag. Observations started at twilight.  The observations began at zenith distance = 35 deg. The sun  altitude  is -9.1 deg. 

The galactic latitude b = 60 deg., longitude l = 77 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2081821

We obtain a following upper limits.  

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

   15112 | 2022-09-07 10:57:09 |         MASTER-Amur | (15h 02m 22.44s , +45d 06m 26.1s) |   C |   180 | 14.6 |        
   15251 | 2022-09-07 11:00:28 |         MASTER-Amur | (15h 03m 50.66s , +44d 55m 28.1s) |   C |    60 | 15.7 |        
   15471 | 2022-09-07 11:03:08 |         MASTER-Amur | (15h 02m 25.11s , +45d 06m 07.6s) |   C |   180 | 16.1 |        
Filter C is a clear (unfiltred) band. 


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