GCN Circular 38663

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-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the IceCube Alert 241224.30 (trigger No 303893,12h 20m 13.44s , +02d 46m 01.2s, R=0.74) errorbox  16 sec after notice time and 178 sec after trigger time at 2024-12-24 07:13:02 UT, with upper limit up to  19.6 mag. The observations began at zenith distance = 58 deg. The sun  altitude  is -23.6 deg. 

The galactic latitude b = 64 deg., longitude l = 286 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2720792

We obtain a following upper limits.  

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

     188 | 2024-12-24 07:13:02 |         MASTER-OAFA | (12h 11m 01.37s , +02d 23m 57.0s) |   C |    20 | 17.4 |        
     198 | 2024-12-24 07:13:02 |         MASTER-OAFA | (12h 20m 03.95s , +02d 48m 05.1s) |   C |    40 | 19.2 |        
     234 | 2024-12-24 07:13:48 |         MASTER-OAFA | (12h 11m 01.40s , +02d 24m 00.9s) |   C |    20 | 17.4 |        
     245 | 2024-12-24 07:13:49 |         MASTER-OAFA | (12h 20m 03.98s , +02d 48m 08.0s) |   C |    40 | 19.1 |        
     286 | 2024-12-24 07:14:34 |         MASTER-OAFA | (12h 11m 01.39s , +02d 24m 04.5s) |   C |    30 | 17.8 |        
     296 | 2024-12-24 07:14:35 |         MASTER-OAFA | (12h 20m 04.01s , +02d 48m 10.6s) |   C |    50 | 19.3 |        
     352 | 2024-12-24 07:15:30 |         MASTER-OAFA | (12h 11m 01.44s , +02d 24m 08.9s) |   C |    50 | 18.1 |        
     362 | 2024-12-24 07:15:31 |         MASTER-OAFA | (12h 20m 04.07s , +02d 48m 14.2s) |   C |    70 | 19.4 |        
     433 | 2024-12-24 07:16:47 |         MASTER-OAFA | (12h 11m 01.46s , +02d 24m 14.0s) |   C |    60 | 18.1 |        
     443 | 2024-12-24 07:16:47 |         MASTER-OAFA | (12h 20m 04.09s , +02d 48m 18.2s) |   C |    80 | 19.4 |        
     529 | 2024-12-24 07:18:13 |         MASTER-OAFA | (12h 11m 01.41s , +02d 24m 18.4s) |   C |    80 | 18.2 |        
     539 | 2024-12-24 07:18:13 |         MASTER-OAFA | (12h 20m 04.10s , +02d 48m 22.0s) |   C |   100 | 19.6 |        
     645 | 2024-12-24 07:19:59 |         MASTER-OAFA | (12h 11m 01.32s , +02d 24m 23.7s) |   C |   100 | 18.2 |        
     616 | 2024-12-24 07:20:00 |         MASTER-OAFA | (12h 20m 04.07s , +02d 48m 25.3s) |   C |    40 | 19.1 |        
     661 | 2024-12-24 07:20:45 |         MASTER-OAFA | (12h 20m 04.07s , +02d 48m 27.0s) |   C |    40 | 19.1 |        
     707 | 2024-12-24 07:21:31 |         MASTER-OAFA | (12h 20m 04.10s , +02d 48m 29.2s) |   C |    40 | 19.2 |        
     798 | 2024-12-24 07:22:17 |         MASTER-OAFA | (12h 11m 01.24s , +02d 24m 30.1s) |   C |   130 | 18.4 |        
     758 | 2024-12-24 07:22:17 |         MASTER-OAFA | (12h 20m 04.10s , +02d 48m 31.5s) |   C |    50 | 19.3 |        
     813 | 2024-12-24 07:23:12 |         MASTER-OAFA | (12h 20m 04.09s , +02d 48m 33.7s) |   C |    50 | 19.2 |        
     869 | 2024-12-24 07:24:08 |         MASTER-OAFA | (12h 20m 04.09s , +02d 48m 35.9s) |   C |    50 | 19.0 |        
     980 | 2024-12-24 07:25:04 |         MASTER-OAFA | (12h 11m 01.15s , +02d 24m 37.6s) |   C |   160 | 18.5 |        
     930 | 2024-12-24 07:25:04 |         MASTER-OAFA | (12h 20m 04.10s , +02d 48m 38.3s) |   C |    60 | 19.4 |        
     996 | 2024-12-24 07:26:09 |         MASTER-OAFA | (12h 20m 04.08s , +02d 48m 41.0s) |   C |    60 | 19.4 |        
    1061 | 2024-12-24 07:27:15 |         MASTER-OAFA | (12h 20m 04.05s , +02d 48m 43.4s) |   C |    60 | 18.9 |        
    1177 | 2024-12-24 07:28:21 |         MASTER-OAFA | (12h 11m 00.97s , +02d 24m 43.7s) |   C |   160 | 17.7 |        
    1127 | 2024-12-24 07:28:21 |         MASTER-OAFA | (12h 20m 04.02s , +02d 48m 45.1s) |   C |    60 | 18.6 |        
    1193 | 2024-12-24 07:29:27 |         MASTER-OAFA | (12h 20m 04.00s , +02d 48m 47.6s) |   C |    60 | 18.0 |        
    1259 | 2024-12-24 07:30:32 |         MASTER-OAFA | (12h 20m 03.95s , +02d 48m 49.0s) |   C |    60 | 17.5 |        
    1375 | 2024-12-24 07:31:39 |         MASTER-OAFA | (12h 11m 00.82s , +02d 24m 48.7s) |   C |   160 | 16.4 |        
    1325 | 2024-12-24 07:31:39 |         MASTER-OAFA | (12h 20m 03.96s , +02d 48m 51.7s) |   C |    60 | 17.4 |        
    1391 | 2024-12-24 07:32:44 |         MASTER-OAFA | (12h 20m 03.92s , +02d 48m 53.2s) |   C |    60 | 16.3 |        
Filter C is a clear (unfiltred) band. 


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