TITLE:   GCN CIRCULAR
NUMBER:  34983
SUBJECT: GRB 231111A: MASTER OT earlier detection
DATE:    23/11/11 16:40:06 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

V. Lipunov, P.Balanutsa (Lomonosov MSU), N.Budnev, O.Gress (ISU, API),A.Sankovich,
D.Vlasenko, Yu.Tselik, Ya.Kechin, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, N.Tiurina,
A.Chasovnikov, I.Gorbunov, D.Zimnukhov, V.Senik, V.Topolev, D.Cheryasov, A.Sosnovskij, V.Senik (Lomonosov Moscow State University, SAI, Physics Department),
R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),
D. Buckley (South African Astronomical Observatory),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico FelixAguilar OAFA),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational State University)

MASTER Global robotic net (http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L)
started (Lipunov et al. GCN 34980)
Swift GRB 231111A (Ttrigger=14:17:19UT, Melandri al. GCN 34981, XRTstart=99s after trigger time)
17s after notice time at 14:17:57UT.

We detected optical counterpart (Melandri et al. GCN 34981) of GRB 231111A
MASTER OT J192045.23+522610.1 from first image at rise stage.
We see Smooth Optical Self-similar Emission of this Gamma-Ray Bursts
(SOSS-emission, Lipunov et al. 2017, ApJ, 845, id9 https://ui.adsabs.harvard.edu/abs/2017ApJ...845...52L/abstract )

Observations and reduction will be continued.