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GCN Circular 33513

Fermi trigger No 701321709: Global MASTER-Net observations report
2023-03-24T11:15:10Z (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 GRB230324.15 (trigger No 701321709,20h 32m 04.80s , +55d 26m 24.0s, R=7.35) errorbox  26189 sec after notice time and 26220 sec after trigger time at 2023-03-24 10:52:04 UT, with upper limit up to  16.1 mag. Observations started at twilight.  The observations began at zenith distance = 69 deg. The sun  altitude  is -10.9 deg. 

The galactic latitude b =  9 deg., longitude l = 92 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

   26251 | 2023-03-24 10:52:04 |         MASTER-Amur | (20h 19m 09.63s , +60d 12m 22.6s) |   C |    60 | 15.9 |        
   26330 | 2023-03-24 10:53:24 |         MASTER-Amur | (20h 35m 17.96s , +60d 14m 11.2s) |   C |    60 | 15.9 |        
   26491 | 2023-03-24 10:56:04 |         MASTER-Amur | (19h 48m 41.95s , +60d 12m 54.4s) |   C |    60 | 15.6 |        
   26571 | 2023-03-24 10:57:24 |         MASTER-Amur | (20h 04m 39.34s , +60d 12m 02.1s) |   C |    60 | 16.1 |        
Filter C is a clear (unfiltred) band. 

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