Back
GCN Circular 38497

Subject
Fermi GRB 241209C: Global MASTER-Net observations report
Date
2024-12-09T19:30:49Z (a month 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 241209C ( Fermi GBM team, GCN 38482Loading...
 
 ) errorbox  41800 sec after notice time and 41825 sec after trigger time at 2024-12-09 18:59:59 UT, with upper limit up to  17.5 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -57.6 deg. 

The galactic latitude b = 12 deg., longitude l = 220 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2701134

We obtain a following upper limits.  

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

   41855 | 2024-12-09 18:59:59 |   MASTER-Kislovodsk | (07h 45m 09.49s , -00d 33m 01.9s) |   C |    60 | 16.5 |        
   41935 | 2024-12-09 19:01:19 |   MASTER-Kislovodsk | (07h 53m 08.72s , -00d 32m 20.8s) |   C |    60 | 16.9 |        
   42097 | 2024-12-09 19:04:01 |   MASTER-Kislovodsk | (07h 45m 10.51s , -00d 34m 01.9s) |   C |    60 | 17.3 |        
   42177 | 2024-12-09 19:05:21 |   MASTER-Kislovodsk | (07h 53m 14.71s , -00d 34m 16.8s) |   C |    60 | 16.9 |        
   42339 | 2024-12-09 19:08:03 |   MASTER-Kislovodsk | (07h 45m 12.59s , -00d 33m 47.5s) |   C |    60 | 16.8 |        
   42418 | 2024-12-09 19:09:22 |   MASTER-Kislovodsk | (07h 29m 57.54s , -00d 32m 27.7s) |   C |    60 | 17.3 |        
   42497 | 2024-12-09 19:10:42 |   MASTER-Kislovodsk | (07h 37m 56.59s , -00d 31m 43.1s) |   C |    60 | 17.5 |        
   42656 | 2024-12-09 19:13:21 |   MASTER-Kislovodsk | (07h 37m 57.58s , -00d 33m 39.4s) |   C |    60 | 17.5 |        
   42736 | 2024-12-09 19:14:40 |   MASTER-Kislovodsk | (07h 30m 03.51s , -00d 33m 16.2s) |   C |    60 | 17.3 |        
   42982 | 2024-12-09 19:18:46 |   MASTER-Kislovodsk | (07h 53m 15.57s , -00d 32m 07.6s) |   C |    60 | 16.9 |        
   43228 | 2024-12-09 19:22:52 |   MASTER-Kislovodsk | (07h 53m 15.43s , -00d 32m 37.7s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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