GCN Circular 38511

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-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB241210.04 (trigger No 755485387,01h 20m 36.00s , +70d 57m 36.0s, R=12.56) errorbox  671 sec after notice time and 696 sec after trigger time at 2024-12-10 01:14:39 UT, with upper limit up to  18.3 mag. The observations began at zenith distance = 53 deg. The sun  altitude  is -35.0 deg. 

The galactic latitude b =  9 deg., longitude l = 126 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2701815

We obtain a following upper limits.  

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

     787 | 2024-12-10 01:14:39 |   MASTER-Kislovodsk | (02h 23m 37.27s , +73d 17m 39.2s) |   C |   180 | 17.9 |        
    1186 | 2024-12-10 01:21:18 |   MASTER-Kislovodsk | (02h 51m 33.92s , +73d 19m 08.5s) |   C |   180 | 18.0 |        
    1386 | 2024-12-10 01:24:38 |   MASTER-Kislovodsk | (02h 23m 37.58s , +73d 19m 27.5s) |   C |   180 | 18.1 |        
    1786 | 2024-12-10 01:31:18 |   MASTER-Kislovodsk | (02h 51m 31.76s , +73d 20m 23.6s) |   C |   180 | 17.9 |        
    1985 | 2024-12-10 01:34:37 |   MASTER-Kislovodsk | (02h 23m 36.36s , +73d 18m 13.0s) |   C |   180 | 18.1 |        
    3649 | 2024-12-10 02:02:21 |   MASTER-Kislovodsk | (02h 51m 39.75s , +73d 18m 26.3s) |   C |   180 | 17.6 |        
    3849 | 2024-12-10 02:05:41 |   MASTER-Kislovodsk | (02h 51m 34.19s , +73d 17m 08.8s) |   C |   180 | 18.1 |        
    4049 | 2024-12-10 02:09:00 |   MASTER-Kislovodsk | (02h 53m 59.19s , +73d 17m 31.6s) |   C |   180 | 13.3 |        
    4248 | 2024-12-10 02:12:20 |   MASTER-Kislovodsk | (02h 23m 37.99s , +73d 17m 44.8s) |   C |   180 | 18.1 |        
    4448 | 2024-12-10 02:15:40 |   MASTER-Kislovodsk | (02h 23m 37.59s , +73d 15m 53.3s) |   C |   180 | 18.1 |        
    4648 | 2024-12-10 02:19:00 |   MASTER-Kislovodsk | (02h 23m 41.81s , +73d 17m 22.5s) |   C |   180 | 18.2 |        
    6303 | 2024-12-10 02:46:35 |   MASTER-Kislovodsk | (02h 51m 44.54s , +73d 17m 28.6s) |   C |   180 | 17.3 |        
    6503 | 2024-12-10 02:49:55 |   MASTER-Kislovodsk | (02h 51m 37.36s , +73d 16m 35.6s) |   C |   180 | 17.7 |        
    6703 | 2024-12-10 02:53:15 |   MASTER-Kislovodsk | (02h 51m 39.50s , +73d 17m 24.6s) |   C |   180 | 15.9 |        
    6902 | 2024-12-10 02:56:34 |   MASTER-Kislovodsk | (02h 23m 48.99s , +73d 15m 15.6s) |   C |   180 | 18.0 |        
    7103 | 2024-12-10 02:59:55 |   MASTER-Kislovodsk | (02h 26m 40.49s , +73d 14m 14.8s) |   C |   180 | 13.4 |        
    7303 | 2024-12-10 03:03:15 |   MASTER-Kislovodsk | (02h 23m 51.46s , +73d 14m 17.8s) |   C |   180 | 18.3 |        
Filter C is a clear (unfiltred) band. 


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