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GCN Circular 34706

Swift GRB230916.11: Global MASTER-Net observations report
2023-09-16T02:54:48Z (6 days ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
Submitted By
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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-OAFA robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the Swift GRB230916.11 (trigger No 1192233,17h 27m 14.64s , -16d 22m 53.4s, R=0.05) errorbox  16 sec after notice time and 96 sec after trigger time at 2023-09-16 02:41:12 UT, with upper limit up to  16.7 mag. The observations began at zenith distance = 60 deg. The sun  altitude  is -52.0 deg. 

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

Real time updated cover map and OT discovered available here:

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment

     107 |         MASTER-OAFA |   C |    20 | 16.6 |        
     152 |         MASTER-OAFA |   C |    30 | 16.6 |        
     207 |         MASTER-OAFA |   C |    40 | 16.6 |        
     273 |         MASTER-OAFA |   C |    50 | 16.7 |        
     347 |         MASTER-OAFA |   C |    60 | 16.6 |        
Filter C is a clear (unfiltred) band. 

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

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