GCN Circular 21014
Subject
Swift Trigger 748858: MASTER-OAFA early optical observations
Date
2017-04-19T13:58:58Z (9 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, D.Kuvshinov, N.Tyurina,
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 possible grb's Swift Trigger 748858 17
sec after notice time and 93 sec after trigger time at 2017-04-19 07:45:09
UT. On our first (20s exposure) set we haven`t found optical transient
within SWIFT error-box (ra=199.85 dec=15.4703 r=0.05) (M. H. Siegel et al.
GCN 21011).
The 5-sigma upper limit has been about 18.7 mag
Maximal limit of coadded images starting at 2017-04-19 07:45:09 (93 s
after trigger time, 5000s exposure) is 19.7 mag.
The observations made on zenit distance = 71 degrees, galaxy latitude b =
76 degree.
The moon (51 % bright part) is 47 degrees above the horizon. The distance
between moon and object is 104
The sun altitude is -41.8 degree.
The object observed till 2017-04-19 09:29:17
The message may be cited.