GCN Circular 23359
Subject
GRB 181020A: Global MASTER Net OT observations
Date
2018-10-21T18:05:37Z (6 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
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
D. Buckley, S. Potter, A. Kniazev, M. Kotze
South African Astronomical Observatory
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)
Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias
MASTER-SAAO robotic telescope (MASTER-Net: http://observ.pereplet.ru,
Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in
South Africa (South African Astronomical Observatory) was starting survey
on the SWIFT GRB181020.79 error-box (ra=00 55 55.78 dec=-47 22 52
r=0.05; Moss et all., GCN #23349; Axelsson et al., Fermi LAT, GCN #23350)
7550 sec after notice time and 7572 sec
after trigger time at 2018-10-20
21:06:45 UT. The delay connected with weather condition around trigeer
time. The 5-sigma upper
limit on our first (540s exposure) coadd set is about 19.5 mag
We see possible nonmonotonic behaviour OT detected UVOT ( Moss et all.,
GCN #23349;). More accurate (handmade) reduction will be coming.
The automatic OT LC is available at
http://observ.pereplet.ru/images/GRB181020A_LC.jpg
The galactic latitude b = -70 deg., longitude l = 300 deg.
The observations made on zenit distance = 16 deg.The moon (85 % bright
part) is 60 deg. above the horizon. The distance between moon and object
is 45 degrees.
The sun altitude is -43.7 deg.
The object can be observed till sunrise at 2018-10-21 03:49:44
This message may be cited.
