[vsnet-grb-info 19347] GRB 170428A: MASTER-OAFA early optical observations
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sat Apr 29 00:20:03 JST 2017
TITLE: GCN CIRCULAR
NUMBER: 21044
SUBJECT: GRB 170428A: MASTER-OAFA early optical observations
DATE: 17/04/28 15:19:42 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov at 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 II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in OAFA was pointed to the GRB170428.38 17 sec after notice time
and 31 sec after trigger time at 2017-04-28 09:14:14 UT. On our first (10s
exposure) set we haven`t found optical transient within SWIFT error-box
(ra=330.062 dec=26.9172 r=0.05).
The 5-sigma upper limit has been about 16.5 mag
The observations made on zenit distance = 72 degrees, galaxy latitude b =
-22 degree.
The moon ( 5 % bright part) below the horizon (The altitude of the Moon is
-49 degree ).
The sun altitude is -24.2 degree.
The object can be observed till sunrise at 2017-04-28 11:06:50
The message may be cited.
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