GCN Circular 37793

V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik,  D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(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. Gress, N.M. Budnev, O.Ershova
(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),

V. Yurkov, A. Gabovich
(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 241016.04 (trigger No 2910365,07h 29m 18.96s , -33d 31m 44.4s, R=0.87) errorbox  69 sec after notice time and 167 sec after trigger time at 2024-10-16 01:01:19 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -34.5 deg. 

The galactic latitude b = -7 deg., longitude l = 247 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2639656

We obtain a following upper limits.  

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

     183 | 2024-10-16 01:01:19 |         MASTER-SAAO | (07h 25m 36.62s , -33d 28m 57.2s) |   C |    30 | 17.3 |        
     237 | 2024-10-16 01:02:08 |         MASTER-SAAO | (07h 25m 36.62s , -33d 28m 57.6s) |   C |    40 | 17.4 |        
     301 | 2024-10-16 01:03:08 |         MASTER-SAAO | (07h 25m 36.62s , -33d 28m 57.4s) |   C |    50 | 17.6 |        
     375 | 2024-10-16 01:04:16 |         MASTER-SAAO | (07h 25m 36.59s , -33d 28m 57.3s) |   C |    60 | 17.7 |        
     454 | 2024-10-16 01:05:35 |         MASTER-SAAO | (07h 25m 36.54s , -33d 28m 57.1s) |   C |    60 | 17.6 |        
Filter C is a clear (unfiltred) band. 


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