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GCN Circular 38440

Subject
Fermi GRB 241204A: Global MASTER-Net observations report
Date
2024-12-04T16:30:42Z (22 days ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
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 GRB 241204A ( E. Bissaldi et al., GCN 38436Loading...
 
 ) errorbox  39000 sec after notice time and 40326 sec after trigger time at 2024-12-04 14:51:28 UT, with upper limit up to  19.8 mag. Observations started at twilight.  The observations began at zenith distance = 41 deg. The sun  altitude  is -13.4 deg. 

The galactic latitude b = -26 deg., longitude l = 53 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2695247

We obtain a following upper limits.  

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

   40356 | 2024-12-04 14:51:28 |   MASTER-Kislovodsk | (21h 05m 11.61s , +06d 39m 14.6s) |   C |    60 | 17.3 |        
   40617 | 2024-12-04 14:55:49 |   MASTER-Kislovodsk | (21h 05m 10.85s , +06d 36m 35.4s) |   C |    60 | 17.7 |        
   40677 | 2024-12-04 14:55:49 |   MASTER-Kislovodsk | (21h 05m 10.85s , +06d 36m 35.3s) |   C |   180 | 18.4 |  Coadd 
   41157 | 2024-12-04 14:55:49 |   MASTER-Kislovodsk | (21h 05m 10.84s , +06d 36m 35.4s) |   C |  1140 | 19.8 |  Coadd 
   40697 | 2024-12-04 14:57:09 |   MASTER-Kislovodsk | (21h 05m 17.71s , +06d 36m 52.8s) |   C |    60 | 17.8 |        
   40776 | 2024-12-04 14:58:28 |   MASTER-Kislovodsk | (21h 05m 13.79s , +06d 38m 06.3s) |   C |    60 | 17.7 |        
   40856 | 2024-12-04 14:59:48 |   MASTER-Kislovodsk | (21h 05m 14.85s , +06d 36m 37.2s) |   C |    60 | 17.8 |        
   40976 | 2024-12-04 14:59:48 |   MASTER-Kislovodsk | (21h 05m 14.85s , +06d 36m 37.1s) |   C |   300 | 19.0 |  Coadd 
   40966 | 2024-12-04 15:01:08 |   MASTER-Kislovodsk | (21h 05m 17.13s , +06d 38m 07.3s) |   C |   120 | 18.4 |        
   41105 | 2024-12-04 15:03:27 |   MASTER-Kislovodsk | (21h 05m 12.10s , +06d 37m 15.1s) |   C |   120 | 18.5 |        
   41245 | 2024-12-04 15:05:47 |   MASTER-Kislovodsk | (21h 05m 11.16s , +06d 38m 11.1s) |   C |   120 | 18.4 |        
   41365 | 2024-12-04 15:05:47 |   MASTER-Kislovodsk | (21h 05m 11.16s , +06d 38m 11.1s) |   C |   360 | 19.2 |  Coadd 
   41385 | 2024-12-04 15:08:07 |   MASTER-Kislovodsk | (21h 05m 18.09s , +06d 37m 07.3s) |   C |   120 | 18.5 |        
   41525 | 2024-12-04 15:10:27 |   MASTER-Kislovodsk | (21h 05m 11.35s , +06d 36m 04.7s) |   C |   120 | 18.5 |        
   41665 | 2024-12-04 15:12:47 |   MASTER-Kislovodsk | (21h 05m 18.32s , +06d 36m 12.3s) |   C |   120 | 18.6 |        
   41725 | 2024-12-04 15:12:47 |   MASTER-Kislovodsk | (21h 05m 18.32s , +06d 36m 12.3s) |   C |   240 | 19.0 |  Coadd 
   41774 | 2024-12-04 15:15:06 |   MASTER-Kislovodsk | (21h 05m 14.44s , +06d 37m 37.2s) |   C |    60 | 18.0 |        
   41854 | 2024-12-04 15:16:26 |   MASTER-Kislovodsk | (21h 05m 15.52s , +06d 36m 04.1s) |   C |    60 | 18.0 |        
   41934 | 2024-12-04 15:17:46 |   MASTER-Kislovodsk | (21h 05m 18.53s , +06d 37m 41.4s) |   C |    60 | 18.0 |        
   42114 | 2024-12-04 15:17:46 |   MASTER-Kislovodsk | (21h 05m 18.51s , +06d 37m 41.2s) |   C |   420 | 19.5 |  Coadd 
   42073 | 2024-12-04 15:19:05 |   MASTER-Kislovodsk | (21h 05m 12.75s , +06d 36m 52.9s) |   C |   180 | 18.8 |        
   42273 | 2024-12-04 15:22:25 |   MASTER-Kislovodsk | (21h 05m 11.88s , +06d 37m 48.3s) |   C |   180 | 18.8 |        
   42473 | 2024-12-04 15:25:45 |   MASTER-Kislovodsk | (21h 05m 18.89s , +06d 36m 44.0s) |   C |   180 | 18.8 |        
   43655 | 2024-12-04 15:46:27 |   MASTER-Kislovodsk | (20h 46m 30.15s , +05d 04m 06.4s) |   C |    60 | 17.7 |        
   44775 | 2024-12-04 16:05:07 |   MASTER-Kislovodsk | (20h 54m 32.68s , +05d 03m 31.1s) |   C |    60 | 17.5 |        
   44855 | 2024-12-04 16:06:27 |   MASTER-Kislovodsk | (20h 46m 28.95s , +05d 04m 25.4s) |   C |    60 | 17.8 |        
   44935 | 2024-12-04 16:07:47 |   MASTER-Kislovodsk | (20h 54m 29.51s , +05d 02m 58.9s) |   C |    60 | 17.7 |        
   45014 | 2024-12-04 16:09:06 |   MASTER-Kislovodsk | (20h 46m 31.91s , +05d 04m 23.6s) |   C |    60 | 17.8 |        
   45154 | 2024-12-04 16:10:26 |   MASTER-Kislovodsk | (20h 58m 42.92s , +03d 10m 49.9s) |   C |   180 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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