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GCN Circular 34980

Subject
Swift GRB231111.60: Global MASTER-Net observations report
Date
2023-11-11T14:29:23Z (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, 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-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the Swift GRB231111.60 (trigger No 1195887,19h 20m 56.16s , +52d 26m 49.2s, R=0.05) errorbox  17 sec after notice time and 37 sec after trigger time at 2023-11-11 14:17:57 UT, with upper limit up to  19.4 mag. The observations began at zenith distance = 45 deg. The sun  altitude  is -44.8 deg. 

The galactic latitude b = 17 deg., longitude l = 84 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2301436

We obtain a following upper limits.  

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

      39 |        MASTER-Tunka |   C |     1 | 13.9 |        
      39 |        MASTER-Tunka |   C |     1 | 16.9 |        
      67 |        MASTER-Tunka |   C |    10 | 17.6 |        
      68 |        MASTER-Tunka |   C |    10 | 19.0 |        
      96 |        MASTER-Tunka |   C |    10 | 17.6 |        
      97 |        MASTER-Tunka |   C |    10 | 19.1 |        
     131 |        MASTER-Tunka |   C |    20 | 18.1 |        
     131 |        MASTER-Tunka |   C |    20 | 19.4 |        
Filter C is a clear (unfiltred) band. 


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