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GCN Circular 33140

Fermi trigger No 694259491: Global MASTER-Net observations report
2023-01-02T12:15:12Z (a year ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
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-Tunka robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB230101.41 (trigger No 694259491,20h 02m 31.20s , +53d 03m 00.0s, R=5.39) errorbox  2822 sec after notice time and 2855 sec after trigger time at 2023-01-01 10:39:02 UT, with upper limit up to  18.3 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -13.1 deg. 

The galactic latitude b = 12 deg., longitude l = 87 deg.

Real time updated cover map and OT discovered available here:

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment

    2885 | 2023-01-01 10:39:02 |        MASTER-Tunka | (19h 17m 17.14s , +52d 35m 08.1s) |   C |    60 | 18.3 |        
   91864 | 2023-01-02 11:22:00 |        MASTER-Tunka | (19h 41m 36.32s , +50d 37m 37.3s) |   C |    60 | 18.3 |        
   92863 | 2023-01-02 11:38:39 |        MASTER-Tunka | (19h 41m 39.99s , +50d 34m 52.9s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 

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