[vsnet-grb-info 27482] Integral GRB210227.19: MASTER OT retraction

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  29585
SUBJECT: Integral GRB210227.19: MASTER OT retraction
DATE:    21/02/27 14:54:54 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, V.Kornilov, E.Gorbovskoy,N.Tiurina,P.Balanutsa,F.Balakin, V.Vladimirov, A.Kuznetsov,K.Zhirkov,D. Vlasenko, I.Gorbunov, D.Zimnukhov, 
V.Senik, A.Chasovnikov,A.Pozdnyakov,V.Topolev, D.Cheryasov(Lomonosov Moscow 
State University, SAI, Physics Department),
R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico FelixAguilar 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),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)

MASTER collaboration reports:
MASTER OT, publishied in GCN 29580, is not new optical source, but is 
known bright star (error in coordinates detection was from bad weather conditions)

We apologize for any confusion this error may have caused.