TITLE:   GCN CIRCULAR
NUMBER:  23594
SUBJECT: GRB 181228A: Global MASTER Net  OT is the same REM IR transient 
DATE:    18/12/31 09:57:40 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, N.Tiurina, E. Gorbovskoy, V.Kornilov,  P.Balanutsa,
A.Kuznetsov, D. Vlasenko, D.Kobtsev
(Lomonosov Moscow State University, SAI),

R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix 
Aguilar),

H. Levato
(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio of San Juan 
National University, Argentina)

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
(The Instituto de Astrofisica de Canarias),

D. Buckley (South African Astronomical Observatory),

A. Tlatov, V.Senik,  D. Dormidontov
(Kislovodsk Solar Station of the Pulkovo Observatory),

O. Gress, N.M. Budnev, S. Yazev, O. Chuvalaev (Irkutsk State University, API)

V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State 
University)



The optical source detected by MASTER (Lipunov et al., GCN 23576) insidet 
Swift BAT GRB 181228A error box (Moss et al., GCN 23570) 
regardless of the infrared telescope REM  (D'Avanzo et al., GCN 23575)
is one and the same source. The difference in coordinates is less than 3 
sigma. Our coordinates are of course rather rough, since the source itself 
is very weak. Let me remind you that the pixel MASTER is equal to 2.5 
arcsec.
OT (not infrared)  discovered by MASTER is disappear on late imeges!

HNY!

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