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GCN Circular 28633

Swift GRB201015.95: Global MASTER-Net OT detection
2020-10-15T23:00:44Z (4 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa,
A.Kuznetsov, V.V.Chazov, D. Vlasenko
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University

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

K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk
Irkutsk State University

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

R. Podesta, Carlos Lopez and F. Podesta
Observatorio Astronomico Felix Aguilar (OAFA)

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

D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory

MASTER-Tavrida robotic telescope (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the  GRB201015.95 67 sec after notice time and 88 sec after trigger time at 2020-10-15 22:51:41 UT. On our 3-th (30s exposure)  set , obtained 168 sec after tigger time at 2020-10-15 22:53:01 UT, we  found 1 optical transient within Swift error-box (ra=354.342 dec=53.3925 r=0.05) brighter than  17.6.

 T-Tmid      Date      Time       Expt.        Ra                Dec           Mag
     183   2020-10-15 22:53:01      30   (23h 37m 16.42s , +53d 24m 55.8s)     16.9

The 5-sigma upper limit has been about  17.6mag
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