GCN Circular 38355

V.Lipunov, E.Gorbovskoy, N.Tiurina,  P.Balanutsa, , D.Vlasenko, I.Panchenko,
A.Kuznetsov,  G.Antipov,  A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin,
V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU),
O.Gress, N.Budnev (ISU),
C.Francile,  F. Podesta, R.Podesta, E. Gonzalez  (Observatorio Astronomico Felix Aguilar (OAFA),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)
D.Buckley (SAAO),
R.Rebolo (The Instituto de Astrofisica de Canarias),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) 

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 241127.59 (trigger No 41215060,10h 55m 02.88s , +05d 54m 46.8s, R=0.51) errorbox  39590 sec after notice time and 39645 sec after trigger time at 2024-11-28 01:11:59 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -23.6 deg. 

The galactic latitude b = 55 deg., longitude l = 246 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2685949

We obtain a following upper limits.  

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

   39735 | 2024-11-28 01:11:59 |         MASTER-SAAO | (10h 48m 19.09s , +05d 07m 06.3s) |   C |   180 | 19.0 |        
   39934 | 2024-11-28 01:15:18 |         MASTER-SAAO | (10h 56m 24.83s , +05d 08m 43.8s) |   C |   180 | 19.2 |        
   40134 | 2024-11-28 01:18:38 |         MASTER-SAAO | (11h 03m 32.09s , +05d 08m 51.5s) |   C |   180 | 19.1 |        
   40915 | 2024-11-28 01:31:39 |         MASTER-SAAO | (10h 48m 18.34s , +05d 06m 59.9s) |   C |   180 | 17.7 |        
Filter C is a clear (unfiltred) band. 


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