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GCN Circular 35336

Subject
Swift GRB231214.85: Global MASTER-Net observations report
Date
2023-12-14T20:41:31Z (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-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) was pointed to the Swift GRB231214.85 (trigger No 1202386,20h 22m 56.64s , -72d 26m 09.6s, R=0.05) errorbox  81 sec after notice time and 103 sec after trigger time at 2023-12-14 20:26:11 UT, with upper limit up to  18.5 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -27.0 deg. 

The galactic latitude b = -33 deg., longitude l = 322 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2332686

We obtain a following upper limits.  

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

     108 |         MASTER-SAAO | P\\ |    10 | 16.9 |        
     133 |         MASTER-SAAO | P\\ |    60 | 18.3 |  Coadd 
     108 |         MASTER-SAAO |  P/ |    10 | 16.8 |        
     133 |         MASTER-SAAO |  P/ |    60 | 18.0 |  Coadd 
     131 |         MASTER-SAAO | P\\ |    20 | 17.6 |        
     131 |         MASTER-SAAO |  P/ |    20 | 17.4 |        
     176 |         MASTER-SAAO | P\\ |    30 | 18.0 |        
     176 |         MASTER-SAAO |  P/ |    30 | 17.8 |        
     219 |         MASTER-SAAO | P\\ |    40 | 18.2 |        
     219 |         MASTER-SAAO |  P/ |    40 | 17.9 |        
     274 |         MASTER-SAAO |  P/ |   150 | 18.5 |  Coadd 
     271 |         MASTER-SAAO | P\\ |    50 | 18.2 |        
     271 |         MASTER-SAAO |  P/ |    50 | 18.1 |        
     346 |         MASTER-SAAO | P\\ |    60 | 17.5 |        
     346 |         MASTER-SAAO |  P/ |    60 | 17.5 |        
     425 |         MASTER-SAAO | P\\ |    60 | 17.3 |        
     425 |         MASTER-SAAO |  P/ |    60 | 17.4 |        
     516 |         MASTER-SAAO | P\\ |    60 | 17.3 |        
     516 |         MASTER-SAAO |  P/ |    60 | 17.4 |        
     596 |         MASTER-SAAO | P\\ |    60 | 17.3 |        
     596 |         MASTER-SAAO |  P/ |    60 | 17.4 |        
     686 |         MASTER-SAAO | P\\ |    60 | 17.4 |        
     686 |         MASTER-SAAO |  P/ |    60 | 17.4 |        


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