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GCN Circular 34072

Subject
MAXI GRB 230623A: MASTER optical observations
Date
2023-06-23T15:35:27Z (8 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

V.Lipunov, A.Kuznetsov, N.Tiurina, E.Gorbovskoy, P.Balanutsa, K.Zhirkov, O.Gress,  A.Chasovnikov, G.Antipov, D.Vlasenko,
V.Senik, V.Topolev, Ya.Kechin, Yu.Tselik, Siyu Wu, D.Cheryasov, V.Shumkov, T.Pogrosheva (Lomonosov Moscow State University,SAI,Physics Department),
C.Francile, F. Podesta, C.Lopez, R. Podesta (Observatorio Astronomico Felix Aguilar OAFA),
D.Buckley (SAAO),
R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez,J.Martinez,A.Corella,L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory),
N.M.Budnev, O.Ershova (ISU,API),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University),
M.Gulyaev, E.Minkina (Lomonosov MSU)

MASTER-OAFA obotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)
pointed to MAXI/GSC GRB 230623A (Hagiwara et al. GCN 34068,
Trigger=2023-06-23 07:23:37 UT, not came in socket, Tnotice(GCN)=09:39:20)
at 2023-06-23 10:14:25UT through  clouds with  mlim=17.0 at first 6 images (sun alt.=-16 and sunrise), we don't find OT insode 0.23deg MAXI error-box by auto-detection system.

We also made the difference with old MASTER image and didn't find new optical sources, that can be connected with GRB.


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