TITLE:   GCN CIRCULAR
NUMBER:  28315
SUBJECT: GRB 200829A: Global MASTER-Net OT detection
DATE:    20/08/29 19:50:58 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

V. Lipunov, N.Tyurina, E. Gorbovskoy, V.Kornilov, P.Balanutsa, 
A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, 
D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov,  D. Cheryasov
(Lomonosov Moscow State University, SAI, Physics Department),

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

R. Rebolo, M. Serra
(The Instituto de Astrofisica de Canarias),

D. Buckley
(South African Astronomical Observatory),

O.A. Gres, N.M. Budnev, O.Ershova
(Irkutsk State University, API),

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

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




MASTER-Tavrida robotic telescope  (Global MASTER-Net: 
http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, 
vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical 
station) was pointed to the Swift GRB 200829A ( M. H. Siegel et al., GCN 
28307) errorbox  12423 sec after notice time and 12502 sec after trigger 
time at 2020-08-29 17:27:56 UT, with upper limit up to  18.5 mag.

We see OT at Swift/UVOT  position (Kuin et al GCN 28311).

Datetime:  2020-08-29 17:36:40
Coord:     16h 44m 48.88s , +72d 19m 45s.8
Mag:       18.1

Observations started at twilight.
The observations began at zenith 
distance = 30 deg. The sun  altitude  is -11.7 deg.