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GCN Circular 38264

Subject
Fermi GRB 241117B: Global MASTER-Net observations report
Date
2024-11-17T20:31:10Z (24 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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 241117B ( Fermi GBM team, GCN 38263Loading...
 
 ) errorbox  109 sec after notice time and 141 sec after trigger time at 2024-11-17 20:19:17 UT, with upper limit up to  17.5 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -30.8 deg. 

The galactic latitude b = -21 deg., longitude l = 76 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2673826

We obtain a following upper limits.  

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

     157 | 2024-11-17 20:19:17 |         MASTER-SAAO | (21h 31m 20.93s , +22d 14m 37.0s) |   C |    30 | 17.0 |        
     192 | 2024-11-17 20:19:17 |         MASTER-SAAO | (21h 31m 20.93s , +22d 14m 37.0s) |   C |   100 | 17.5 |  Coadd 
     206 | 2024-11-17 20:20:06 |         MASTER-SAAO | (21h 31m 21.63s , +22d 14m 38.4s) |   C |    30 | 16.9 |        
     260 | 2024-11-17 20:20:56 |         MASTER-SAAO | (21h 31m 22.48s , +22d 14m 39.7s) |   C |    40 | 16.9 |        
     329 | 2024-11-17 20:21:55 |         MASTER-SAAO | (21h 31m 23.55s , +22d 14m 42.0s) |   C |    60 | 16.8 |        
Filter C is a clear (unfiltred) band. 


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