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GCN Circular 34539

Subject
Integral GRB230824.72: Global MASTER-Net observations report
Date
2023-08-24T17:38:29Z (a year 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, D. Vlasenko, 
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov,  D.Cheryasov, Ya.Kechin
(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. Gres, N.M. Budnev
(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),

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


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Integral GRB230824.72 (trigger No 10375,17h 27m 41.31s , -16d 11m 56.0s, R=0.0503333) errorbox  17 sec after notice time and 28 sec after trigger time at 2023-08-24 17:17:41 UT, with upper limit up to  16.5 mag. Observations started at twilight.  The observations began at zenith distance = 60 deg. The sun  altitude  is -8.2 deg. 

The galactic latitude b = 10 deg., longitude l =  9 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2259687

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

      33 |      MASTER-Tavrida |   C |    10 | 14.9 |        
      50 |      MASTER-Tavrida |   C |    10 | 14.9 |        
      68 |      MASTER-Tavrida |   C |    10 | 14.9 |        
      90 |      MASTER-Tavrida |   C |    20 | 15.2 |        
     120 |      MASTER-Tavrida |   C |    20 | 15.2 |        
     153 |      MASTER-Tavrida |   C |    30 | 15.4 |        
     196 |      MASTER-Tavrida |   C |    40 | 15.6 |        
     244 |      MASTER-Tavrida |   C |    40 | 15.6 |        
     297 |      MASTER-Tavrida |   C |    50 | 15.7 |        
     364 |      MASTER-Tavrida |   C |    70 | 15.9 |        
     449 |      MASTER-Tavrida |   C |    80 | 16.1 |        
     550 |      MASTER-Tavrida |   C |   100 | 16.2 |        
     669 |      MASTER-Tavrida |   C |   120 | 16.3 |        
     812 |      MASTER-Tavrida |   C |   150 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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