TITLE:   GCN CIRCULAR
NUMBER:  29447
SUBJECT: GRB 210210A: MASTER afterglow observation
DATE:    21/02/10 07:03:14 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@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-SAAO robotic telescope (MASTER-Net: http://observ.pereplet.ru 
Lipunov et al.,2010,Advances in Astronomy,2010,30L)
automatically was pointed to Swift GRB 200210A (Laha et al. GCN 29444,Ttrigger 02:00:27UT)
at 2021-02-10 02:03:54UT (first exposition),
but the alert altitude was 07 degrees (under the roof, so there is no stars at first images)
and roses above the roof only 27min after trigger time  (Lipunov et al. GCN 29445).

MASTER auto-detection system found optical afterglow
  MASTER OT J173104.99+143945.9 (discovered by Swift-UVOT, GCN 29444).
We observed it untill sunrise (MASTER automatical programm of Swift alert observations).

The reduction of MASTER wide field and very wide field cameras images will be continued.
This message may be cited.