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GCN Circular 33496

Fermi trigger No 701058254: Global MASTER-Net observations report
2023-03-21T12:00:12Z (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-Amur robotic telescope  (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB230321.10 (trigger No 701058254,06h 21m 14.40s , +53d 59m 24.0s, R=1) errorbox  24924 sec after notice time and 33615 sec after trigger time at 2023-03-21 11:44:24 UT, with upper limit up to  17.3 mag. The observations began at zenith distance = 15 deg. The sun  altitude  is -19.6 deg. 

The galactic latitude b = 18 deg., longitude l = 161 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

   33645 | 2023-03-21 11:44:24 |         MASTER-Amur | (06h 32m 16.81s , +54d 25m 54.9s) |   C |    60 | 17.0 |        
   33804 | 2023-03-21 11:47:04 |         MASTER-Amur | (06h 15m 15.66s , +52d 32m 44.9s) |   C |    60 | 17.2 |        
   33884 | 2023-03-21 11:48:23 |         MASTER-Amur | (06h 28m 24.31s , +52d 31m 14.7s) |   C |    60 | 17.3 |        
Filter C is a clear (unfiltred) band. 

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