GCN Circular 37106

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-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) started inspect of the IceCube Alert 240808.27 (trigger No 13003768,03h 25m 57.84s , +32d 27m 21.6s, R=6.63) errorbox  27962 sec after notice time and 28014 sec after trigger time at 2024-08-08 14:19:33 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 70 deg. The sun  altitude  is -21.9 deg. 

The galactic latitude b = -19 deg., longitude l = 157 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2555083

We obtain a following upper limits.  

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

   28044 | 2024-08-08 14:19:33 |         MASTER-Amur | (02h 57m 20.13s , +37d 49m 14.4s) |   C |    60 | 16.9 |        
   28698 | 2024-08-08 14:30:27 |         MASTER-Amur | (02h 53m 01.14s , +35d 54m 24.6s) |   C |    60 | 17.8 |        
   28978 | 2024-08-08 14:35:07 |         MASTER-Amur | (02h 57m 13.52s , +37d 48m 45.6s) |   C |    60 | 17.5 |        
   38684 | 2024-08-08 17:15:53 |         MASTER-Amur | (03h 40m 19.34s , +31d 50m 08.6s) |   C |   180 | 18.7 |        
   38684 | 2024-08-08 17:15:53 |         MASTER-Amur | (03h 48m 23.15s , +32d 16m 30.0s) |   C |   180 | 18.2 |        
   38897 | 2024-08-08 17:19:26 |         MASTER-Amur | (03h 40m 19.01s , +31d 49m 56.4s) |   C |   180 | 18.8 |        
   38897 | 2024-08-08 17:19:26 |         MASTER-Amur | (03h 48m 22.99s , +32d 16m 17.2s) |   C |   180 | 18.3 |        
   39111 | 2024-08-08 17:22:59 |         MASTER-Amur | (03h 40m 18.62s , +31d 49m 44.1s) |   C |   180 | 18.7 |        
   39111 | 2024-08-08 17:22:59 |         MASTER-Amur | (03h 48m 22.78s , +32d 16m 04.4s) |   C |   180 | 18.3 |        
   39324 | 2024-08-08 17:26:33 |         MASTER-Amur | (03h 40m 18.21s , +31d 49m 31.6s) |   C |   180 | 18.7 |        
   39324 | 2024-08-08 17:26:33 |         MASTER-Amur | (03h 48m 22.55s , +32d 15m 52.0s) |   C |   180 | 18.3 |        
   39537 | 2024-08-08 17:30:05 |         MASTER-Amur | (03h 40m 17.79s , +31d 49m 19.3s) |   C |   180 | 18.8 |        
   39537 | 2024-08-08 17:30:05 |         MASTER-Amur | (03h 48m 22.34s , +32d 15m 39.4s) |   C |   180 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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