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GCN Circular 37265

Subject
Fermi GRB 240824C: Global MASTER-Net observations report
Date
2024-08-24T18:30:30Z (2 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-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 240824C ( Fermi GBM team, GCN 37264Not found
 
 
) errorbox  6917 sec after notice time and 6925 sec after trigger time at 2024-08-24 17:17:41 UT, with upper limit up to  17.7 mag. Observations started at twilight.  The observations began at zenith distance = 81 deg. The sun  altitude  is -13.5 deg. 

The galactic latitude b = 22 deg., longitude l = 266 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2573441

We obtain a following upper limits.  

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

    6955 | 2024-08-24 17:17:41 |         MASTER-SAAO | (10h 16m 39.07s , -30d 59m 04.4s) |   C |    60 | 15.6 |        
    7197 | 2024-08-24 17:21:43 |         MASTER-SAAO | (10h 25m 53.94s , -30d 59m 48.9s) |   C |    60 | 16.9 |        
    7628 | 2024-08-24 17:28:53 |         MASTER-SAAO | (10h 29m 32.27s , -32d 54m 31.9s) |   C |    60 | 13.4 |        
    7707 | 2024-08-24 17:30:13 |         MASTER-SAAO | (10h 38m 56.51s , -32d 52m 52.3s) |   C |    60 | 14.7 |        
    7947 | 2024-08-24 17:34:13 |         MASTER-SAAO | (10h 34m 21.65s , -30d 58m 37.0s) |   C |    60 | 16.7 |        
    8027 | 2024-08-24 17:35:32 |         MASTER-SAAO | (10h 43m 37.11s , -31d 00m 26.8s) |   C |    60 | 14.4 |        
    8106 | 2024-08-24 17:36:52 |         MASTER-SAAO | (10h 25m 09.09s , -34d 46m 33.1s) |   C |    60 | 17.1 |        
    8186 | 2024-08-24 17:38:11 |         MASTER-SAAO | (10h 34m 56.11s , -34d 47m 39.0s) |   C |    60 | 17.7 |        
    8265 | 2024-08-24 17:39:30 |         MASTER-SAAO | (10h 21m 25.63s , -36d 42m 26.9s) |   C |    60 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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