GCN Circular 21147
Subject
GRB 170524B: MASTER-OAFA observations
Date
2017-05-26T09:42:12Z (8 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
R.Podesta, C.Lopez, F. Podesta Observatorio Astronomico Felix Aguilar (OAFA),
National University of San Juan, Argentina
H. Levato, C. Saffe
Instituto de Ciencias Astronomicas,de la Tierra y del Espacio (ICATE),
San Juan, Argentina
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, D.Kuvshinov, A.V.Krylov,
I.Gorbunov, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D. Vlasenko
Lomonosov Moscow State University, Sternberg Astronomical Institut of MSU
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk, O. Ershova
Irkutsk State University
V.Yurkov, Yu.Sergienko
Blagoveschensk Educational State University, Blagoveschensk
A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
MASTER robotic telescope (6 square degrees)
located in OAFA was pointed to the GRB170525B (Barthelmy et al., GCN
#21142) 15191 sec after notice
time and 43294 sec after trigger time at 2017-05-25 22:42:14 UT. On our
first (180s exposure) set we haven`t found optical transient within
Master error-box (ra=90.8625 dec=-17.0861 r=0.1).
The 5-sigma upper limit has been about 18.3 mag
There is no OT at added images brighter 19.9 at Swift XRT position
(Barthelmy et al., GCN #21142; Evans, GCN #21144 ).
The observations made on zenit distance = 59 degrees, galaxy latitude b =
-18 degree.
The moon ( 0 % bright part) below the horizon (The altitude of the Moon is
-8 degree ).
Observations started at twilight. The sun altitude is -12.7 degree.
The object can be observed till 2017-05-26 01:12:20
The message may be cited.