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GCN Circular 28125

Swift GRB200716C: Global MASTER-Net OT detection
2020-07-16T23:41:37Z (4 years ago)
Vladimir Lipunov at Moscow State U/Krylov Obs <>
V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, 
A.Kuznetsov, D. Vlasenko, F. Balakin, I. Gorbunov
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University

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

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

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

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

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

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

Hugo Levato
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

MASTER-IAC robotic telescope (Global MASTER-Net:, Lipunov et al., 2010, Advances in Astronomy, 
vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to 
the  GRB200716C (Ukwatta et al, GCN 28124)  55 sec after notice time and 
79 sec after trigger time at 2020-07-16 22:59:00 UT.
On our 5-th (50s exposure)  set , obtained 243 sec after tigger time
at 2020-07-16 23:01:45 UT, we  found an optical transient within Swift 
error-box (ra=196.012 dec=29.6292 r=0.05) brighter.

  T-Tmid      Date      Time       Expt.        Ra                Dec          Mag
      268   2020-07-16 23:01:45      50   (13h 04m 02.41s , +29d 38m 39.4s)   16.3

The 5-sigma upper limit has been about  16.6mag
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