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GCN Circular 37431

Subject
Fermi GRB 240908A: Global MASTER-Net observations report
Date
2024-09-08T22:15:32Z (3 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik,  D. Vlasenko,
G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij
(Lomonosov Moscow State University, SAI, Physics Department),

R. Podesta, C.Lopez, F. Podesta, C.Francile
(Observatorio Astronomico Felix Aguilar OAFA),

R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),

D. Buckley
(South African Astronomical Observatory),

O.A. Gress, N.M. Budnev, O.Ershova
(Irkutsk State University, API),

L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez
(INAOE, Guillermo Haro Astrophysics Observatory),

A. Tlatov, D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),

V. Yurkov, A. Gabovich
(Blagoveschensk Educational State University)

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 240908A ( Fermi GBM team, GCN 37428Loading...
 
 ) errorbox  27974 sec after notice time and 28011 sec after trigger time at 2024-09-08 21:32:56 UT, with upper limit up to  15.9 mag. The observations began at zenith distance = 37 deg. The sun  altitude  is -41.3 deg. 

The galactic latitude b = -17 deg., longitude l = 147 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2594412

We obtain a following upper limits.  

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

   28041 | 2024-09-08 21:32:56 |   MASTER-Kislovodsk | (02h 54m 44.97s , +39d 22m 26.9s) |   C |    60 | 15.9 |        
   28122 | 2024-09-08 21:34:16 |   MASTER-Kislovodsk | (02h 50m 05.47s , +37d 27m 35.5s) |   C |    60 | 14.8 |        
   28202 | 2024-09-08 21:35:37 |   MASTER-Kislovodsk | (02h 59m 46.76s , +41d 15m 34.4s) |   C |    60 | 15.2 |        
   28283 | 2024-09-08 21:36:57 |   MASTER-Kislovodsk | (02h 39m 31.45s , +41d 17m 41.2s) |   C |    60 | 15.0 |        
   28363 | 2024-09-08 21:38:18 |   MASTER-Kislovodsk | (02h 35m 01.99s , +39d 22m 14.3s) |   C |    60 | 14.8 |        
   28444 | 2024-09-08 21:39:38 |   MASTER-Kislovodsk | (02h 44m 30.37s , +43d 11m 25.2s) |   C |    60 | 14.4 |        
   28525 | 2024-09-08 21:40:59 |   MASTER-Kislovodsk | (02h 45m 53.64s , +35d 34m 48.2s) |   C |    60 | 14.2 |        
   28605 | 2024-09-08 21:42:19 |   MASTER-Kislovodsk | (02h 30m 55.67s , +37d 30m 11.0s) |   C |    60 | 14.4 |        
   28685 | 2024-09-08 21:43:40 |   MASTER-Kislovodsk | (03h 05m 16.35s , +43d 10m 12.2s) |   C |    60 | 14.3 |        
   28766 | 2024-09-08 21:45:00 |   MASTER-Kislovodsk | (03h 09m 08.34s , +37d 27m 13.4s) |   C |    60 | 13.8 |        
   28847 | 2024-09-08 21:46:21 |   MASTER-Kislovodsk | (03h 14m 21.65s , +39d 21m 24.4s) |   C |    60 | 13.1 |        
Filter C is a clear (unfiltred) band. 


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