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GCN Circular 33768

Subject
Fermi trigger No 705496510: Global MASTER-Net observations report
Date
2023-05-11T12:30:27Z (a year ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
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: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB230511.47 (trigger No 705496510,09h 39m 50.40s , +01d 44m 24.0s, R=16.03) errorbox  3471 sec after notice time and 3505 sec after trigger time at 2023-05-11 12:13:31 UT, with upper limit up to  16.3 mag. Observations started at twilight.  The observations began at zenith distance = 58 deg. The sun  altitude  is -9.9 deg. 

The galactic latitude b = 38 deg., longitude l = 234 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2216069

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    3536 | 2023-05-11 12:13:31 |         MASTER-Amur | (09h 33m 50.84s , +01d 13m 04.8s) |   C |    60 | 16.1 |        
    3615 | 2023-05-11 12:14:51 |         MASTER-Amur | (09h 41m 43.50s , +01d 12m 13.7s) |   C |    60 | 16.2 |        
    3695 | 2023-05-11 12:16:10 |         MASTER-Amur | (09h 18m 35.00s , +01d 13m 20.4s) |   C |    60 | 16.3 |        
    3775 | 2023-05-11 12:17:30 |         MASTER-Amur | (09h 26m 34.73s , +01d 11m 45.8s) |   C |    60 | 16.2 |        
    3858 | 2023-05-11 12:18:53 |         MASTER-Amur | (09h 34m 33.16s , +03d 06m 43.9s) |   C |    60 | 16.3 |        
Filter C is a clear (unfiltred) band. 


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


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